odd trace output 10046
How can I get 24 seconds waited sqlnet client message if the total response time is 7 seconds. This seems to be a flaw in the 10046 metric timing route.OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 3 0.00 0.00 0 0 0 0
Execute 4 0.01 0.00 0 0 0 2
Fetch 2 7.17 7.01 191184 198038 0 1
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 9 7.18 7.01 191184 198038 0 3
Misses in library cache during parse: 0
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 5 0.00 0.00
SQL*Net message from client 5 22.10 24.73
db file scattered read 8277 0.00 2.70
db file sequential read 780 0.00 0.01Try an experiement:
ALTER SESSION SET EVENTS '10046 TRACE NAME CONTEXT FOREVER, LEVEL 8';
SELECT SYSDATE FROM DUAL;
I then think about the situation, what happens if my DUAL table is slow... should I have tried this with a different version of the Oracle... anything to kill 45 seconds. Then, then run:
DISCONNECT ALL;
TKPROF output the following:
SELECT SYSDATE
FROM
DUAL
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.00 0.00 0 0 0 1
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 4 0.00 0.00 0 0 0 1
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 46
Rows Row Source Operation
------- ---------------------------------------------------
1 FAST DUAL (cr=0 pr=0 pw=0 time=5 us)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 2 0.00 0.00
SQL*Net message from client 2 45.75 45.75
0 seconds of CPU time, elapsed time 0 seconds and 45.75 in the SQL * Net message from the expectation of the client - waiting for the next request from the client computer. Note that the maximum wait is approximately the same Total expected - I think the same is true for you.
Let's look at the raw trace file:
PARSING IN CURSOR #1 len=24 dep=0 uid=46 oct=3 lid=46 tim=360672877551 hv=124468195 ad='7cb3df00'
SELECT SYSDATE FROM DUAL
END OF STMT
PARSE #1:c=0,e=487,p=0,cr=0,cu=0,mis=1,r=0,dep=0,og=1,tim=360672877548
EXEC #1:c=0,e=24,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=360672877886
WAIT #1: nam='SQL*Net message to client' ela= 2 driver id=1413697536 #bytes=1 p3=0 obj#=10417 tim=360672878021
FETCH #1:c=0,e=17,p=0,cr=0,cu=0,mis=0,r=1,dep=0,og=1,tim=360672878117
WAIT #1: nam='SQL*Net message from client' ela= 147 driver id=1413697536 #bytes=1 p3=0 obj#=10417 tim=360672879450
FETCH #1:c=0,e=1,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=0,tim=360672879532
WAIT #1: nam='SQL*Net message to client' ela= 1 driver id=1413697536 #bytes=1 p3=0 obj#=10417 tim=360672879606
*** 2009-07-22 20:37:47.741
WAIT #1: nam='SQL*Net message from client' ela= 45757081 driver id=1413697536 #bytes=1 p3=0 obj#=10417 tim=360718636761
XCTEND rlbk=0, rd_only=1
STAT #1 id=1 cnt=1 pid=0 pos=1 obj=0 op='FAST DUAL (cr=0 pr=0 pw=0 time=5 us)'
Note the line: "SQL * Net client message' ela = 45757081 - that happened after the last extraction of calls."
In short, the wait is probably at the end, before writing to the trace file has been disabled.
Charles Hooper
IT Manager/Oracle DBA
K & M-making Machine, Inc.
Tags: Database
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Thank youAllYourDataBase wrote:
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http://download.Oracle.com/docs/CD/B19306_01/network.102/b14266/AppendixA.htm#CHDIBAJE
"
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http://download.Oracle.com/docs/CD/B28359_01/AppDev.111/b28419/d_sessio.htm#i1010518Charles Hooper
Co-author of "Expert Oracle practices: Oracle Database Administration of the Oak Table.
http://hoopercharles.WordPress.com/
IT Manager/Oracle DBA
K & M-making Machine, Inc.Published by: Charles Hooper on August 9, 2010 15:33
The default value on 11g is FIRST_EXECUTION, while the behavior before 11 g is ALL_EXECUTIONS - fixed the incomplete sentence. -
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CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX1" ON "VOIP"."MONTHLY_BILLING_DETAILS" (TRUNC("DATETIME_CONNECT")) PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 4194304 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ; CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX10" ON "VOIP"."MONTHLY_BILLING_DETAILS" ("CALL_TYPE") PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 4194304 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ; CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX2" ON "VOIP"."MONTHLY_BILLING_DETAILS" ("FROM_EXCHANGE") PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 3145728 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ; CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX3" ON "VOIP"."MONTHLY_BILLING_DETAILS" ("FROM_FULL_TELEPHONE", TRUNC("DATETIME_CONNECT")) PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ; CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX4" ON "VOIP"."MONTHLY_BILLING_DETAILS" ("DATETIME_CONNECT", NVL("FROM_FULL_TELEPHONE","CALLINGPARTYNUMBER")) PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 5242880 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ; CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX5" ON "VOIP"."MONTHLY_BILLING_DETAILS" ("DATETIME_CONNECT", NVL("TO_FULL_TELEPHONE","ORIGINALCALLEDPARTYNUMBER")) PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 5242880 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ; CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX6" ON "VOIP"."MONTHLY_BILLING_DETAILS" (TO_CHAR("DATETIME_CONNECT",'fmMONTH YYYY')) PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 4194304 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ; CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX7" ON "VOIP"."MONTHLY_BILLING_DETAILS" ("TO_EXCHANGE") PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 3145728 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ; CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX8" ON "VOIP"."MONTHLY_BILLING_DETAILS" (NVL("FROM_FULL_TELEPHONE","CALLINGPARTYNUMBER")) PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 4194304 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ; CREATE INDEX "VOIP"."MONTHLY_BILL_INDEX9" ON "VOIP"."MONTHLY_BILLING_DETAILS" ("DATETIME_CONNECT") PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 3145728 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "VOIPDATA" ;These are the functions to determine if a phone number is assigned to multiple staffs or departments:
FUNCTION GET_EMPLOYEE_NAME (P_FROM_FULL_TELEPHONE IN VARCHAR2) RETURN VARCHAR2 AS L_NAME EMPLOYEES.NAME%TYPE; BEGIN SELECT NAME INTO L_NAME FROM EMPLOYEES WHERE WORK_PHONE_1_FORMAT = P_FROM_FULL_TELEPHONE; RETURN L_NAME; EXCEPTION WHEN TOO_MANY_ROWS THEN L_NAME := 'Multiple Employees'; RETURN L_NAME; WHEN NO_DATA_FOUND THEN L_NAME := 'No Employee Assigned'; RETURN L_NAME; WHEN OTHERS THEN NULL; END;
FUNCTION GET_DEPARTMENT_NAME (P_FROM_FULL_TELEPHONE IN VARCHAR2) RETURN VARCHAR2 AS L_DEPT_DESCR EMPLOYEES.DEPT_DESCR%TYPE; BEGIN SELECT DEPT_DESCR INTO L_DEPT_DESCR FROM EMPLOYEES WHERE WORK_PHONE_1_FORMAT = P_FROM_FULL_TELEPHONE; RETURN L_DEPT_DESCR; EXCEPTION WHEN TOO_MANY_ROWS THEN L_DEPT_DESCR := 'Multiple Departments'; RETURN L_DEPT_DESCR; WHEN NO_DATA_FOUND THEN L_DEPT_DESCR := 'No Department Assigned'; RETURN L_DEPT_DESCR; WHEN OTHERS THEN NULL; END;
This is the point of view that I'll use in the report:
CREATE OR REPLACE FORCE VIEW "VOIP"."TOP_USERS_BY_CALLS_V" ("TOP_NO", "EMPLOYEE_NAME", "EMPLOYEE_DEPARTMENT", "PHONE_NUMBER", "QUANTITY_CALLS") AS SELECT ROWNUM, VOIP_PKG.GET_EMPLOYEE_NAME(FROM_FULL_TELEPHONE), VOIP_PKG.GET_DEPARTMENT_NAME(FROM_FULL_TELEPHONE), FROM_FULL_TELEPHONE, QUANTITY_CALLS FROM ( SELECT MBD.FROM_FULL_TELEPHONE, COUNT(1) QUANTITY_CALLS FROM MONTHLY_BILLING_DETAILS MBD WHERE MBD.FROM_FULL_TELEPHONE IS NOT NULL AND MBD.FROM_FULL_TELEPHONE <> '000-000-0000' AND LENGTH(MBD.FROM_FULL_TELEPHONE) = 12 AND LENGTH(MBD.TO_FULL_TELEPHONE) = 12 AND SUBSTR(MBD.TO_FULL_TELEPHONE,1,3) NOT IN (SELECT AREA_CODE FROM NYNJ_METRO_AREA_CODES) AND SUBSTR(MBD.TO_FULL_TELEPHONE,1,3) NOT IN ('800','822','833','844', '855','866','877','888') GROUP BY MBD.FROM_FULL_TELEPHONE ORDER BY QUANTITY_CALLS DESC ) WHERE ROWNUM <= 100;Explain Plan output and Extended SQL Trace:
SQL> SQL> show parameter user_dump_dest NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ user_dump_dest string D:\ORACLEHOMES\ADMIN\RTS9\UDUM P SQL> SQL> show parameter optimizer NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ optimizer_dynamic_sampling integer 2 optimizer_features_enable string 10.2.0.5 optimizer_index_caching integer 0 optimizer_index_cost_adj integer 100 optimizer_mode string ALL_ROWS optimizer_secure_view_merging boolean TRUE SQL> SQL> show parameter db_file_multi NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_file_multiblock_read_count integer 16 SQL> SQL> show parameter db_block_size NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_block_size integer 8192 SQL> SQL> show parameter cursor_sharing NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ cursor_sharing string EXACT SQL> SQL> column sname format a20 SQL> column pname format a20 SQL> column pval2 format a20 SQL> SQL> select 2 sname 3 , pname 4 , pval1 5 , pval2 6 from 7 sys.aux_stats$; SNAME PNAME PVAL1 PVAL2 -------------------- -------------------- ---------- -------------------- SYSSTATS_INFO STATUS COMPLETED SYSSTATS_INFO DSTART 02-09-2009 15:46 SYSSTATS_INFO DSTOP 02-09-2009 15:46 SYSSTATS_INFO FLAGS 1 SYSSTATS_MAIN CPUSPEEDNW 1259.6206 SYSSTATS_MAIN IOSEEKTIM 10 SYSSTATS_MAIN IOTFRSPEED 4096 SYSSTATS_MAIN SREADTIM SYSSTATS_MAIN MREADTIM SYSSTATS_MAIN CPUSPEED SYSSTATS_MAIN MBRC SYSSTATS_MAIN MAXTHR SYSSTATS_MAIN SLAVETHR 13 rows selected. Elapsed: 00:00:00.03 SQL> SQL> explain plan for 2 SELECT 3 TOP_NO, 4 EMPLOYEE_NAME, 5 EMPLOYEE_DEPARTMENT, 6 PHONE_NUMBER, 7 QUANTITY_CALLS 8 FROM 9 TOP_USERS_BY_CALLS_V 10 ORDER BY 11 QUANTITY_CALLS DESC; Explained. Elapsed: 00:00:00.18 SQL> SQL> select * from table(dbms_xplan.display); PLAN_TABLE_OUTPUT ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Plan hash value: 826236322 ---------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | ---------------------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 1 | 4042 | 1313 (1)| 00:00:16 | | 1 | SORT ORDER BY | | 1 | 4042 | 1313 (1)| 00:00:16 | | 2 | VIEW | TOP_USERS_BY_CALLS_V | 1 | 4042 | 1312 (1)| 00:00:16 | |* 3 | COUNT STOPKEY | | | | | | | 4 | VIEW | | 1 | 25 | 1312 (1)| 00:00:16 | |* 5 | SORT ORDER BY STOPKEY | | 1 | 26 | 1312 (1)| 00:00:16 | | 6 | HASH GROUP BY | | 1 | 26 | 1312 (1)| 00:00:16 | |* 7 | FILTER | | | | | | |* 8 | TABLE ACCESS BY INDEX ROWID| MONTHLY_BILLING_DETAILS | 1 | 26 | 1310 (1)| 00:00:16 | |* 9 | INDEX FULL SCAN | MONTHLY_BILL_INDEX3 | 934 | | 449 (1)| 00:00:06 | |* 10 | INDEX FULL SCAN | NYNJ_METRO_AREA_CODES_UK1 | 1 | 4 | 1 (0)| 00:00:01 | ---------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 3 - filter(ROWNUM<=100) 5 - filter(ROWNUM<=100) 7 - filter( NOT EXISTS (SELECT 0 FROM VOIP."NYNJ_METRO_AREA_CODES" "NYNJ_METRO_AREA_CODES" WHERE LNNVL("AREA_CODE"<>SUBSTR(:B1,1,3)))) 8 - filter(LENGTH("MBD"."TO_FULL_TELEPHONE")=12 AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'800' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'822' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'833' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'844' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'855' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'866' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'877' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'888') 9 - filter(LENGTH("MBD"."FROM_FULL_TELEPHONE")=12 AND "MBD"."FROM_FULL_TELEPHONE"<>'000-000-0000' AND "MBD"."FROM_FULL_TELEPHONE" IS NOT NULL) 10 - filter(LNNVL("AREA_CODE"<>SUBSTR(:B1,1,3))) 33 rows selected. Elapsed: 00:00:00.82 SQL> SQL> rollback; Rollback complete. Elapsed: 00:00:00.00 SQL> SQL> set autotrace traceonly arraysize 100 SQL> SQL> alter session set tracefile_identifier = 'mytrace1'; Session altered. Elapsed: 00:00:00.01 SQL> SQL> alter session set events '10046 trace name context forever, level 8'; Session altered. Elapsed: 00:00:00.15 SQL> SQL> SELECT 2 TOP_NO, 3 EMPLOYEE_NAME, 4 EMPLOYEE_DEPARTMENT, 5 PHONE_NUMBER, 6 QUANTITY_CALLS 7 FROM 8 TOP_USERS_BY_CALLS_V 9 ORDER BY 10 QUANTITY_CALLS DESC; 100 rows selected. Elapsed: 00:10:37.68 Execution Plan ---------------------------------------------------------- Plan hash value: 826236322 ---------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | ---------------------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 1 | 4042 | 1313 (1)| 00:00:16 | | 1 | SORT ORDER BY | | 1 | 4042 | 1313 (1)| 00:00:16 | | 2 | VIEW | TOP_USERS_BY_CALLS_V | 1 | 4042 | 1312 (1)| 00:00:16 | |* 3 | COUNT STOPKEY | | | | | | | 4 | VIEW | | 1 | 25 | 1312 (1)| 00:00:16 | |* 5 | SORT ORDER BY STOPKEY | | 1 | 26 | 1312 (1)| 00:00:16 | | 6 | HASH GROUP BY | | 1 | 26 | 1312 (1)| 00:00:16 | |* 7 | FILTER | | | | | | |* 8 | TABLE ACCESS BY INDEX ROWID| MONTHLY_BILLING_DETAILS | 1 | 26 | 1310 (1)| 00:00:16 | |* 9 | INDEX FULL SCAN | MONTHLY_BILL_INDEX3 | 934 | | 449 (1)| 00:00:06 | |* 10 | INDEX FULL SCAN | NYNJ_METRO_AREA_CODES_UK1 | 1 | 4 | 1 (0)| 00:00:01 | ---------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 3 - filter(ROWNUM<=100) 5 - filter(ROWNUM<=100) 7 - filter( NOT EXISTS (SELECT 0 FROM VOIP."NYNJ_METRO_AREA_CODES" "NYNJ_METRO_AREA_CODES" WHERE LNNVL("AREA_CODE"<>SUBSTR(:B1,1,3)))) 8 - filter(LENGTH("MBD"."TO_FULL_TELEPHONE")=12 AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'800' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'822' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'833' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'844' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'855' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'866' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'877' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'888') 9 - filter(LENGTH("MBD"."FROM_FULL_TELEPHONE")=12 AND "MBD"."FROM_FULL_TELEPHONE"<>'000-000-0000' AND "MBD"."FROM_FULL_TELEPHONE" IS NOT NULL) 10 - filter(LNNVL("AREA_CODE"<>SUBSTR(:B1,1,3))) Statistics ---------------------------------------------------------- 365 recursive calls 0 db block gets 689543 consistent gets 212906 physical reads 0 redo size 5984 bytes sent via SQL*Net to client 400 bytes received via SQL*Net from client 2 SQL*Net roundtrips to/from client 2 sorts (memory) 0 sorts (disk) 100 rows processed SQL> SQL> disconnectPart of the automatic trace output:
SELECT TOP_NO, EMPLOYEE_NAME, EMPLOYEE_DEPARTMENT, PHONE_NUMBER, QUANTITY_CALLS FROM TOP_USERS_BY_CALLS_V ORDER BY QUANTITY_CALLS DESC call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 1 0.00 0.43 0 0 0 0 Execute 1 0.00 0.00 0 0 0 0 Fetch 2 24.70 635.81 212587 631823 0 100 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 4 24.70 636.25 212587 631823 0 100 Misses in library cache during parse: 1 Optimizer mode: ALL_ROWS Parsing user id: 148 Rows Row Source Operation ------- --------------------------------------------------- 100 SORT ORDER BY (cr=689531 pr=212900 pw=0 time=636823070 us) 100 VIEW TOP_USERS_BY_CALLS_V (cr=689531 pr=212900 pw=0 time=642681672 us) 100 COUNT STOPKEY (cr=631823 pr=212587 pw=0 time=635667026 us) 100 VIEW (cr=631823 pr=212587 pw=0 time=635666810 us) 100 SORT ORDER BY STOPKEY (cr=631823 pr=212587 pw=0 time=635666493 us) 2512 HASH GROUP BY (cr=631823 pr=212587 pw=0 time=635666125 us) 27112 FILTER (cr=631823 pr=212587 pw=0 time=519230237 us) 315563 TABLE ACCESS BY INDEX ROWID MONTHLY_BILLING_DETAILS (cr=381523 pr=212587 pw=0 time=580209555 us) 394473 INDEX FULL SCAN MONTHLY_BILL_INDEX3 (cr=2679 pr=2679 pw=0 time=26793918 us)(object id 206675) 226627 INDEX FULL SCAN NYNJ_METRO_AREA_CODES_UK1 (cr=250300 pr=0 pw=0 time=3575488 us)(object id 206605) Elapsed times include waiting on following events: Event waited on Times Max. Wait Total Waited ---------------------------------------- Waited ---------- ------------ SQL*Net message to client 2 0.00 0.00 db file sequential read 212587 0.20 611.67 SQL*Net message from client 2 0.00 0.00 SQL*Net more data to client 2 0.00 0.00 ********************************************************************************
DBMS_XPLAN. Output DISPLAY_CURSOR:
SQL> SQL> select * from table(dbms_xplan.display_cursor(null, null, 'ALLSTATS LAST')); PLAN_TABLE_OUTPUT ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SQL_ID 1ut636vt58jdw, child number 0 ------------------------------------- SELECT /*+ gather_plan_statistics */ TOP_NO, EMPLOYEE_NAME, EMPLOYEE_DEPARTMENT, PHONE_NUMBER, QUANTITY_CALLS FROM TOP_USERS_BY_CALLS_V ORDER BY QUANTITY_CALLS DESC Plan hash value: 826236322 -------------------------------------------------------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | Reads | OMem | 1Mem | Used-Mem | -------------------------------------------------------------------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 1 | | 100 |00:09:56.06 | 689K| 210K| | | | | 1 | SORT ORDER BY | | 1 | 1 | 100 |00:09:56.06 | 689K| 210K| 13312 | 13312 |12288 (0)| | 2 | VIEW | TOP_USERS_BY_CALLS_V | 1 | 1 | 100 |00:10:04.98 | 689K| 210K| | | | |* 3 | COUNT STOPKEY | | 1 | | 100 |00:09:54.89 | 631K| 210K| | | | | 4 | VIEW | | 1 | 1 | 100 |00:09:54.89 | 631K| 210K| | | | |* 5 | SORT ORDER BY STOPKEY | | 1 | 1 | 100 |00:09:54.88 | 631K| 210K| 6144 | 6144 | 6144 (0)| | 6 | HASH GROUP BY | | 1 | 1 | 2512 |00:09:54.88 | 631K| 210K| 821K| 821K| 1153K (0)| |* 7 | FILTER | | 1 | | 27112 |00:08:58.57 | 631K| 210K| | | | |* 8 | TABLE ACCESS BY INDEX ROWID| MONTHLY_BILLING_DETAILS | 1 | 1 | 315K|00:08:57.07 | 381K| 210K| | | | |* 9 | INDEX FULL SCAN | MONTHLY_BILL_INDEX3 | 1 | 934 | 394K|00:00:23.02 | 2679 | 2679 | | | | |* 10 | INDEX FULL SCAN | NYNJ_METRO_AREA_CODES_UK1 | 250K| 1 | 226K|00:00:03.47 | 250K| 0 | | | | -------------------------------------------------------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 3 - filter(ROWNUM<=100) 5 - filter(ROWNUM<=100) 7 - filter( IS NULL) 8 - filter((LENGTH("MBD"."TO_FULL_TELEPHONE")=12 AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'800' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'822' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'833' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'844' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'855' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'866' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'877' AND SUBSTR("MBD"."TO_FULL_TELEPHONE",1,3)<>'888')) 9 - filter((LENGTH("MBD"."FROM_FULL_TELEPHONE")=12 AND "MBD"."FROM_FULL_TELEPHONE"<>'000-000-0000' AND "MBD"."FROM_FULL_TELEPHONE" IS NOT NULL)) 10 - filter(LNNVL("AREA_CODE"<>SUBSTR(:B1,1,3))) 35 rows selected. Elapsed: 00:00:00.50 SQL> SQL> spool offAny help will be greatly appreciated. Please let me know if you need additional information.
Thank you
Erick
ediazjorge wrote:
Please let me know if you need additional information or do additional tests.
Thanks again!
Erick
It's to you if you are satisfied or interested in improvements (if possible).
If so the first thing I would like if you had your refreshed perspective as advised. According to expected area_code table cardinalities I doubt.
So, if not cool off with dbms_stats.gather_table_stats on two tables, area_codes and MONTHLY_BILLING_DETAILS.
Bottlenecks are now obviously the full table of MONTHLY_BILLING_DETAILS as well as the ANTI of LOOPS IMBRIQUEES scan.
At the moment I don't think that an index of MONTHLY_BILLING_DETAILS will help a lot, because most of the lines will pass filter predicates, and because we need some columns in it, I have now I there will be gain a full index scan.
I was surprissed that the optimizer pushes the substr <> predicates to both tables.
So depending on your data, you might try
1 make a factory of subquery select the two MONTHLY_BILLING_DETAILS columns that all directly apply predicates of membership and use it directly in the join instead of the table.
or
2. If all subtr to so are part of the table area_code choose in it using a subquery (or inline view) plant excluding these values.
Both are attempts to get rid of the substr excluding as filters of join predicates.
In fact, I was expecting a hash join anti as shown in the plan to explain instead of the nested loops anti, I expect to be more effective in this case.
Perhaps with correct cardinalities the optimizier would understand himself.
Just to test it, you can try the use_hash hint in the join:
Select / * + USE_HASH (MBD, one) * /.
..
OF MONTHLY_BILLING_DETAILS MBD,.
NYNJ_METRO_AREA_CODES one
(It's a good habit anyway usually use aliases and precede the names of columns. In the, it is easier to read queries are only trivial).
-
Query in Oracle 10 fast but slow in Oracle 11
Hi all
We have a query that runs smoothly in Oracle 10 g. It takes less then a second. We installed a second server and import/export to create the same 11g database. On this 11g database query takes a long time (like 8 seconds or more).
Here are the details. Maybe someone can tell us the reason why this happens.
We are talking about this statement:
Version of database is 11.2.0.1.0Select nvl(sum(BM_OPENST_D - BM_OPENST_CR),0) from bh.bh123gh where F123_AR_NR>='4400000000' and F123_AR_NR<='4404000000' and F123_KL_LEV_AR_NR='0631001000' and SRT_REK=2 and F123_BKJR>=0000 and F123_BKJR<=2011 and F123_FIRMA=2;
The trace output:SQL> SQL> show parameter optimizer NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ optimizer_capture_sql_plan_baselines boolean FALSE optimizer_dynamic_sampling integer 2 optimizer_features_enable string 11.2.0.1 optimizer_index_caching integer 0 optimizer_index_cost_adj integer 100 optimizer_mode string ALL_ROWS optimizer_secure_view_merging boolean TRUE optimizer_use_invisible_indexes boolean FALSE optimizer_use_pending_statistics boolean FALSE optimizer_use_sql_plan_baselines boolean TRUE SQL> SQL> show parameter db_file_multi NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_file_multiblock_read_count integer 6 SQL> SQL> show parameter db_block_size NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_block_size integer 8192 SQL> SQL> show parameter cursor_sharing NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ cursor_sharing string EXACT SQL> SQL> column sname format a20 SQL> column pname format a20 SQL> column pval2 format a20 SQL> SQL> select sname 2 , pname 3 , pval1 4 , pval2 5 from 6 sys.aux_stats$; SNAME PNAME PVAL1 PVAL2 -------------------- -------------------- ---------- -------------------- SYSSTATS_INFO STATUS COMPLETED SYSSTATS_INFO DSTART 03-30-2010 11:05 SYSSTATS_INFO DSTOP 03-30-2010 11:05 SYSSTATS_INFO FLAGS 1 SYSSTATS_MAIN CPUSPEEDNW 1183.90219 SYSSTATS_MAIN IOSEEKTIM 10 SYSSTATS_MAIN IOTFRSPEED 4096 SYSSTATS_MAIN SREADTIM SYSSTATS_MAIN MREADTIM SYSSTATS_MAIN CPUSPEED SYSSTATS_MAIN MBRC SYSSTATS_MAIN MAXTHR SYSSTATS_MAIN SLAVETHR 13 rows selected. Elapsed: 00:00:00.03 SQL> SQL> explain plan for 2 Select nvl(sum(BM_OPENST_DEB - BM_OPENST_CR),0) 3 from bh.bh123gh 4 where 5 F123_AR_NR>='4400000000' and 6 F123_AR_NR<='4404000000' and 7 F123_KL_LEV_AR_NR='0631001000' and 8 SRT_REK=2 and 9 F123_BKJR>=0000 and 10 F123_BKJR<=2011 and 11 F123_FIRMA=2; Explained. Elapsed: 00:00:00.10 SQL> SQL> select * from table(dbms_xplan.display); PLAN_TABLE_OUTPUT ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Plan hash value: 3488495774 ------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | ------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 1 | 38 | 1792 (1)| 00:00:22 | | 1 | SORT AGGREGATE | | 1 | 38 | | | |* 2 | TABLE ACCESS BY INDEX ROWID| BH123GH | 5059 | 187K| 1792 (1)| 00:00:22 | |* 3 | INDEX RANGE SCAN | I_BH123GH_ISABEL | 5059 | | 145 (0)| 00:00:02 | ------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 2 - filter("F123_BKJR">=0000 AND "F123_BKJR"<=2011) 3 - access("F123_FIRMA"=2 AND "SRT_REK"=2 AND "F123_KL_LEV_AR_NR"='0631001000' AND "F123_AR_NR">='4400000000' AND "F123_AR_NR"<='4404000000') filter("F123_AR_NR"<='4404000000' AND "F123_AR_NR">='4400000000') 18 rows selected. Elapsed: 00:00:00.20 SQL> SQL> rollback; Rollback complete. Elapsed: 00:00:00.01 SQL> SQL> rem Set the ARRAYSIZE according to your application SQL> set autotrace traceonly arraysize 100 SQL> SQL> alter session set tracefile_identifier = 'mytrace1'; Session altered. Elapsed: 00:00:00.01 SQL> SQL> rem if you're using bind variables SQL> rem define them here SQL> SQL> rem variable b_var1 number SQL> rem variable b_var2 varchar2(20) SQL> SQL> rem and initialize them SQL> SQL> rem exec :b_var1 := 1 SQL> rem exec :b_var2 := 'DIAG' SQL> SQL> alter session set events '10046 trace name context forever, level 8'; Session altered. Elapsed: 00:00:00.03 SQL> SQL> -- put your statement here SQL> Select nvl(sum(BM_OPENST_D - BM_OPENST_CR),0) 2 from bh.bh123gh 3 where 4 F123_AR_NR>='4400000000' and 5 F123_AR_NR<='4404000000' and 6 F123_KL_LEV_AR_NR='0631001000' and 7 SRT_REK=2 and 8 F123_BKJR>=0000 and 9 F123_BKJR<=2011 and 10 F123_FIRMA=2; Elapsed: 00:00:09.92 Execution Plan ---------------------------------------------------------- Plan hash value: 3488495774 ------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | ------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 1 | 38 | 1792 (1)| 00:00:22 | | 1 | SORT AGGREGATE | | 1 | 38 | | | |* 2 | TABLE ACCESS BY INDEX ROWID| BH123GH | 5059 | 187K| 1792 (1)| 00:00:22 | |* 3 | INDEX RANGE SCAN | I_BH123GH_ISABEL | 5059 | | 145 (0)| 00:00:02 | ------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 2 - filter("F123_BKJR">=0000 AND "F123_BKJR"<=2011) 3 - access("F123_FIRMA"=2 AND "SRT_REK"=2 AND "F123_KL_LEV_AR_NR"='0631001000' AND "F123_AR_NR">='4400000000' AND "F123_AR_NR"<='4404000000') filter("F123_AR_NR"<='4404000000' AND "F123_AR_NR">='4400000000') Statistics ---------------------------------------------------------- 1 recursive calls 0 db block gets 11104 consistent gets 9434 physical reads 0 redo size 574 bytes sent via SQL*Net to client 519 bytes received via SQL*Net from client 2 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 1 rows processed SQL> SQL> disconnect Disconnected from Oracle Database 11g Release 11.2.0.1.0 - 64bit Production SQL> SQL> spool off
DBMS_XPLAN. Output DISPLAY_CURSOR:TKPROF: Release 11.2.0.1.0 - Development on Tue Nov 22 13:58:33 2011 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved. Trace file: C:\Oracle\diag\rdbms\oravopak\oravopak\trace\oravopak_ora_7352_mytrace1.trc Sort options: default ******************************************************************************** count = number of times OCI procedure was executed cpu = cpu time in seconds executing elapsed = elapsed time in seconds executing disk = number of physical reads of buffers from disk query = number of buffers gotten for consistent read current = number of buffers gotten in current mode (usually for update) rows = number of rows processed by the fetch or execute call ******************************************************************************** Select nvl(sum(BM_OPENST_D - BM_OPENST_CR),0) from bh.bh123gh where F123_AR_NR>='4400000000' and F123_AR_NR<='4404000000' and F123_KL_LEV_AR_NR='0631001000' and SRT_REK=2 and F123_BKJR>=0000 and F123_BKJR<=2011 and F123_FIRMA=2 call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 1 0.01 0.00 0 0 0 0 Execute 1 0.00 0.00 0 0 0 0 Fetch 2 0.03 9.86 9434 11104 0 1 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 4 0.04 9.87 9434 11104 0 1 Misses in library cache during parse: 1 Optimizer mode: ALL_ROWS Parsing user id: SYS Rows Row Source Operation ------- --------------------------------------------------- 1 SORT AGGREGATE (cr=11104 pr=9434 pw=0 time=0 us) 67250 TABLE ACCESS BY INDEX ROWID BH123GH (cr=11104 pr=9434 pw=0 time=10500177 us cost=1792 size=192242 card=5059) 67250 INDEX RANGE SCAN I_BH123GH_ISABEL (cr=526 pr=550 pw=0 time=44363 us cost=145 size=0 card=5059)(object id 75061) Elapsed times include waiting on following events: Event waited on Times Max. Wait Total Waited ---------------------------------------- Waited ---------- ------------ SQL*Net message to client 2 0.00 0.00 Disk file operations I/O 1 0.00 0.00 db file sequential read 8893 0.10 9.26 db file scattered read 7 0.01 0.05 db file parallel read 1 0.02 0.02 SQL*Net message from client 2 0.00 0.00 ********************************************************************************
SQL> SQL> select * from table(dbms_xplan.display_cursor(null, null, 'ALLSTATS LAST')); PLAN_TABLE_OUTPUT ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SQL_ID g6pkv639sdfgw, child number 0 ------------------------------------- Select /*+ gather_plan_statistics */ nvl(sum(BM_OPENST_DEB - BM_OPENST_CR),0) from bh.bh123gh where F123_AR_NR>='4400000000' and F123_AR_NR<='4404000000' and F123_KL_LEV_AR_NR='0631001000' and SRT_REK=2 and F123_BKJR>=0000 and F123_BKJR<=2011 and F123_FIRMA=2 Plan hash value: 3488495774 -------------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | Reads | -------------------------------------------------------------------------------------------------------------------- | 0 | SELECT STATEMENT | | 1 | | 1 |00:00:08.07 | 11104 | 13531 | | 1 | SORT AGGREGATE | | 1 | 1 | 1 |00:00:08.07 | 11104 | 13531 | |* 2 | TABLE ACCESS BY INDEX ROWID| BH123GH | 1 | 5059 | 67250 |00:00:10.90 | 11104 | 13531 | |* 3 | INDEX RANGE SCAN | I_BH123GH_ISABEL | 1 | 5059 | 67250 |00:00:00.05 | 526 | 550 | -------------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 2 - filter(("F123_BKJR">=0 AND "F123_BKJR"<=2011)) 3 - access("F123_FIRMA"=2 AND "SRT_REK"=2 AND "F123_KL_LEV_AR_NR"='0631001000' AND "F123_AR_NR">='4400000000' AND "F123_AR_NR"<='4404000000') filter(("F123_AR_NR"<='4404000000' AND "F123_AR_NR">='4400000000')) 27 rows selected. Elapsed: 00:00:01.15 SQL> SQL> spool offAddition to other boards who has been submitted, a few more suggestions:
* It seems that your DB_FILE_MULTIBLOCK_READ_COUNT parameter has been manually set to a value of 6 (or you have the SESSIONS parameter set to a high value with a small CMS). As a general rule, this should only be set under Oracle database 10.2 and higher. See:
http://jonathanlewis.WordPress.com/2007/05/20/system-stats-strategy/* You have statistics of the noworkload system - it will not necessarily change things for the better for this SQL query special, but you might consider to collect statistics of the workload when the system is covered by a typical to high load. See:
http://hoopercharles.WordPress.com/2011/05/04/how-to-collect-statistics/* As Toon mentioned, single block reads dominate the running time. On average, they are quick to 0.001 seconds (1 ms), but many of them are. What is the buffer cache?
* The SQL statement uses the predicates like this WHERE clause: "F123_AR_NR > = ' F123_AR_NR «»<=", which="" i="" believe="" would="" be="" treated="" differently="" in="" cardinality="" calculations="" (2="" unbounded="" ranges)when="" compared="" to="" a="" where="" clause="" that="" uses="" between="" syntax="" (a="" single="" bounded="" range).="" the="" query="" optimizer="" will="" actually="" transform="" the="" between="" syntax="" into="" two="" unbounded="" ranges,="" but="" if="" i="" remember="" correctly,="" it="" will="" remember="" that="" the="" ranges="" are="" bounded="" when="" performing="" the="" cardinality="">
* The DBMS_XPLAN. DISPLAY_CURSOR output shows that the number of blocks read from disk is 13 531 but you get only 11 104 consistent. The number of physical blocks read must be generally less number of becomes coherent. If I remember correctly, the number of readings of physical blocks can be higher if index preloading takes place, or if the intermediate results must be written for the temp tablespace. In this case, it seems that the index preloading takes place.
* It seems that because this query has been run at least 3 times in succession fast, already read of the disk blocks should remain in the buffer cache. This suggests that the buffer cache is too small. Are the BH123GH table and its indexes defined to use the buffer pool KEEP or RECYCLE, yet these buffer pools are not defined?
Charles Hooper
http://hoopercharles.WordPress.com/
IT Manager/Oracle DBA
K & M-making Machine, Inc. -
libnipalu.so, failed to initialize
Greetings,
We have installed NI - VISA 15.0 on RHEL 7.2 (release attached). When our application running, the following error message appears and the program interrupted. Abandonment occurs when the first call to viOpenDefaultRM().
libnipalu.so, failed to initialize
Maybe you need to run updateNIDrivers
Quit (core dumped)
We ran updateNIDrivers (release attached), which does not seem to change the installed RPM packages (also attached to the command "rpm - qa |") ("grep ^ nor"). But the problem persisted. Previously we tried to uninstall/install with no luck. I looked around the forum and saw this message appear elsewhere, but without a solution to this particular problem. Any suggestions would be greatly appreciated.
Note: I work in a closed area and have to trace output as those attached files. If the output of niSystemReport would be useful, please let me know what I could grep for :-)
Additional info:
//--------------------------------------------
OS - RHEL 7.2, 4 GB RAM
//--------------------------------------------
> uname - r
3.10.0 - 327.EL7.x86_64
//--------------------------------------------------------------------------
Application - simple C++ program with dependencies
//--------------------------------------------------------------------------
Linux - gate.so.1-online (0xf76f7000)
-Online /lib/libnsl.so.1 (0xf76bb000) libnsl.so.1
libvisa.so-online /usr/local/lib/libvisa.so (0xf7672000)
libstdc ++. so.6-online /lib/libstdc++.so.6 (0xf7586000)
libm.so.6-online /lib/libm.so.6 (0xf7543000)
libgcc_s.so.1-online /lib/libgcc_s.so.1 (0xf7527000)
libc.so.6-online /lib/libc.so.6 (0xf736a000)
-Online /lib/libdl.so.2 (0xf7365000) libdl.so.2
-Online /lib/libpthread.so.0 (0xf734b000) libpthread.so.0
/lib/ld-linux.so.2 (0xf76f8000)Kemens thanks for the reply and pointing me to the form of discussion. A brief tutorial, using NI-VISA with Arch Linux (or Ubuntu 14.04), which breaks down some of the install steps and highlights of the things to look for is more useful to this Council.
The issue was the process OR native (nipple, nipxirmu, nisvcloc, etc.) do not bind to the boot. When the box is restarted, these processes are not running which causes the application to abort (during the first call of service VISA). Once they started, everything went well.
There is a workaround for this problem/solution hackaround. See the doc attached for instructions with an example for the nipxirmu.
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