Metric of the influence of the size of the PGA and UGA County cursors

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• Metric of the answer and always "Down".

  I use a very simple answer / statute that is supposed to be collected with the Snmp Fetchlet. When I look at 'Targets Down' I see "the value of Status is 1". It used to be zero, but I patched up things. Nevertheless, the Employment Committee is still announced my system as 'Down' with a big red arrow :-(
  
  I hope you'll excuse some of my naivety, I'm making progress, but I'm still new to plugin development. The browser of the metric is kind of alien to me, I think that would help but I cannot have a simple 'How To' for her that weaves me through all the directories and the installation program.
  
  And so, I'm going straight into the network with my plugin Manager:
  
  I use the OID that could identify the name of the system for the measurement of the response: 1.3.6.1.4.1.42.2.225.1.4.1.0
  
  When I snmpwalk I get my kind of back, system name of what I expected:
  -bash-3, 00 #. / snmpwalk - Os - v1-c 172.20.67.73 public 1.3.6.1.4.1.42.2.225.1.4.1.0
  Enterprises.42.2.225.1.4.1.0 = STRING: isv-"mysystem".
  
  My admin.metadata essentially looks like this (with some names have been changed)
  
  < NAME metric = 'Response' TYPE = "TABLE" >
  < display >
  < NLSID label = "sun_response" > answer < / Label >
  < / display >
  < TableDescriptor >
  < ColumnDescriptor NAME = 'Status' TYPE 'NUMBER' = >
  < display >
  < NLSID label = "sun_resp_status" > status < / Label >
  < / display >
  < / ColumnDescriptor >
  < / TableDescriptor >
  < QueryDescriptor = "Snmp" FETCHLET_ID >
  < property NAME = "NAME" SCOPE = "INSTANCE" > NAME < / property >
  < property NAME = "hostname" SCOPE = "INSTANCE" > AgentHost < / property >
  < property NAME = 'COMMUNITY' SCOPE = "INSTANCE" option = "TRUE" > CommunityString < / property >
  < property NAME = "TIMEOUT" SCOPE = "INSTANCE" option = "TRUE" > Timeout < / property >
  < property NAME 'PINGMODE' SCOPE = 'GLOBAL' = > TRUE < / property >
  < property NAME = 'TABLE' SCOPE 'GLOBAL' = > FALSE < / property >
  < property NAME = 'OID' SCOPE = 'GLOBAL' > 1.3.6.1.4.1.42.2.225.1.4.1.0 < / property >
  < / QueryDescriptor >
  < / metric >
  
  Here's the instance property definition
  < InstanceProperties >
  < InstanceProperty NAME = "AgentHost" CREDENTIAL = 'FALSE' optional = "FALSE" >
  < display >
  < NLSID label = "sun_storage_7000_agent_host" > name of host or IP address < / Label >
  < / display >
  < / InstanceProperty >
  < InstanceProperty NAME = "CommunityString" = "TRUE" = "TRUE" optionally CREDENTIAL >
  < display >
  < NLSID label = "sun_storage_7000_community_string" > SNMP Read community string (default: public) < / Label >
  < / display >
  public
  < / InstanceProperty >
  < InstanceProperty NAME = "Timeout" CREDENTIAL = 'FALSE' optional = "FALSE" >
  < display >
  < NLSID label = "sun_storage_7000_timeout" > the SNMP timeout (default: 5 seconds) < / Label >
  < / display >
  5
  < / InstanceProperty >
  < / InstanceProperties >
  
  And the admin.default_collection was all deleted thresholds:
  < CollectionItem NAME = 'Response' >
  < schedule >
  < INTERVAL '5' TIME_UNIT = IntervalSchedule = 'Min' / >
  < / schedule >
  < / CollectionItem >

  There should be a Condition for the status column of the CollectionItem. The Condition is what will tell the system (via warnings) when the target is upwards and downwards.

• The adaptation and Pl/SQL cursor sharing

  Hello

  I have this database:

  NLSRTL	11.2.0.1.0	Production
  Oracle Database 11g Enterprise Edition	11.2.0.1.0	64 bit Production
  PL/SQL	11.2.0.1.0	Production
  AMT for Solaris:	11.2.0.1.0	Production

  I'm testing the queries and adaptive cursor sharing. I have a table T1 that is created by selecting all object. It has additional is NOT NULL ID of the column that is PK and is filled through sequence. It has a regular index (OBJECT_TYPE, OBJECT_NAME). Statistics are collected on the T1 table and its indexes.

  Total of T1 lines and are 1065951.

  I have run this test in SqlPlus:

  ID of the VARIABLE NUMBER;

  EXECUTE: id: = 10;

  SELECT COUNT (*) FROM t1 WHERE id <: id;

  So I check the instruction in v$ sql and the execution plan and I can see that the plan is:

  SQL_ID, 3m2qaytqgk9jt, number of children 0

  -------------------------------------

  Select COUNT (*) from t1 where id <: id

  Hash value of plan: 212448250

  ---------------------------------------------------------------------------

  | ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

  ---------------------------------------------------------------------------

  |   0 | SELECT STATEMENT |       |       |       |   193 (100) |          |

  |   1.  GLOBAL TRI |       |     1.     6.            |          |

  |*  2 |   INDEX RANGE SCAN | PK_T1 | 99999.   585K |   193 (1) | 00:00:03 |

  ---------------------------------------------------------------------------

  Information of predicates (identified by the operation identity card):

  ---------------------------------------------------

  2 - access("ID"<:ID))

  Second test:

  ID of the VARIABLE NUMBER;

  EXECUTE: id: = 1000000.

  SELECT COUNT (*) FROM t1 WHERE id <: id;

  Execution plan:

  SQL_ID, 3m2qaytqgk9jt, number of children 1

  -------------------------------------

  Select COUNT (*) from t1 where id <: id

  Hash value of plan: 1953966236

  -------------------------------------------------------------------------------

  | ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |

  -------------------------------------------------------------------------------

  |   0 | SELECT STATEMENT |       |       |       |   559 (100) |          |

  |   1.  GLOBAL TRI |       |     1.     6.            |          |

  |*  2 |   FULL RESTRICTED INDEX SCAN FAST | PK_T1 |  1000K |  5859K |   559 (2) | 00:00:07 |

  -------------------------------------------------------------------------------

  Information of predicates (identified by the operation identity card):

  ---------------------------------------------------

  2 - filter("ID"<:ID))

  Output:

  SQL > SELECT sql_id, child_number, executions, 'IS_BIND_SENSITIVE', 'IS_BIND_AWARE', 'IS_SHAREABLE' OF V$ SQL WHERE SQL_ID = "3m2qaytqgk9jt";

  THE EXECUTIONS OF CHILD_NUMBER SQL_ID I I I

  ------------- ------------ ---------- - - -

  3m2qaytqgk9jt 0 2 O N N

  1 3 3m2qaytqgk9jt Y Y Y

  As we can see it Adaptive cursor sharing has been used and in both cases the appropriate execution plan has been used.

  When I run test with PL/SQL block, however, I don't see the use of extended cursor sharing. Could you please help understand why?

  The test is (I used deliberately < = in order to create the new parent cursor):

  DECLARE

  PID NUMBER;

  CNT PLS_INTEGER;

  BEGIN

  BECAUSE me in 1... 10 LOOP

  IF i IN (2, 4, 6, 10) THEN

  PID: = round (dbms_random.value (1, 5000));

  ON THE OTHER

  PID: = round ((100000, 1600000) dbms_random.value);

  END IF;

  dbms_output.put_line ('ID: ' | pid);

  COUNT (*) of SELECT INTO cnt FROM t1 WHERE id < = pid;

  END LOOP;

  END;

  /

  Output of this is:

  ID: 396582

  ID: 2584

  ID: 560405

  ID: 3275

  ID: 827442

  ID: 4515

  ID: 167771

  ID: 652411

  ID: 512147

  ID: 230

  As we can see some ID values are good candidates for INDEX BEACH, others are for the INDEX FAST FULL SCAN. However, I am only a child cursor for my parents:

  SQL > SELECT sql_id, child_number, executions, 'IS_BIND_SENSITIVE', 'IS_BIND_AWARE', 'IS_SHAREABLE' OF V$ SQL WHERE SQL_ID = "6xh03mm87nmu3";

  THE EXECUTIONS OF CHILD_NUMBER SQL_ID I I I

  ------------- ------------ ---------- - - -

  0 10 6xh03mm87nmu3 Y N Y

  SQL >

  Please pay attention to the value for IS_BIND_AWARE, who is with my first child 0. So no other children were created. Why in PL/SQL, it behaves differently and how can we enjoy the cursor of adaptation in this context?

  Thank you!

  My immediate thoughts were under cover PLSQL optimizations.

  PLSQL_OPTIMIZE_LEVEL has no effect.

  To run I had to Board BIND_AWARE and SESSION_CACHED_CURSORS value 0.

  Subsequently found Randolf Geist post in the same direction:

  Oracle related stuff: Adaptive Cursor Sharing

• question about the use of the PGA and TEMP

  Hello
  We had a situation whereby OEM reported that because the PGA was too small for a period of time that e/s additional on the TEMP was created. So does that mean that the TEMP has acted as a pseudo PGA.
  
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