Forcing AP Mesh to join a particular parent
Hi there;
I have a setup of 10 1522 APs (4 PA and 6 cards). Two of them (RAP one card) are placed pretty far from those remaining. The two remote APs function correctly, as you wish (distance card chooses the closest RAP as parent) but when RAP loses its ethernet connection due to the wireline network failure; card joins a distance RAP with very low SNR and rest at home, even when the desired RAP rises again.
There is kind of, we can define a priority who joins the intended map RAP as soon as it comes alive again?
Thank you
Background scanning are currently supported by the Decade. The result of this is the condition you have described. Bug CSCsw28993 has been filed so that the analysis in the background added to the Decade.
Tags: Cisco Wireless
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902629 wrote:
I need advice/suggestion on the query plan below. This plan is go for Nested Loops, am not able to force to go to the hash join or Merge Join with tips.
You will not be able to use a hash join
http://docs.Oracle.com/CD/E11882_01/server.112/e16638/optimops.htm#i36043
>
The optimizer uses hash join to join two tables if they are added by using an equijoin and if one of the following conditions are met:
>You may be able to force a sort merge join, it does not mention if different will work, I don't see how it would be
http://docs.Oracle.com/CD/E11882_01/server.112/e16638/optimops.htm#i49183
>
Sort merge joins are useful when the join condition between two tables is a condition of inequality such as <,>,> <=,>, or > =. Fusion type joints are more successful than joins loops nested for large sets of data. You cannot use hash joins unless there is a condition of equality.
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Hello
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His stats are updated in the tables (used 100% as % estimate just to eliminate quality stat here)
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Please note that & lsquo; NO "in 'PKEY IN' is a partition does not exist and a part of the application logic that cannot not be changed."
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AND TGT2. PKEY = 'CA')
Published by: max71 on February 28, 2009 16:07------------------------------------------------------------------------------------------------------------------------------------------------- | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop | TQ |IN-OUT| PQ Distrib | ------------------------------------------------------------------------------------------------------------------------------------------------- | 0 | MERGE STATEMENT | | 1 | 520 | 12433 (2)| 00:02:30 | | | | | | | 1 | MERGE | TGT2 | | | | | | | | | | | 2 | PX COORDINATOR | | | | | | | | | | | | 3 | PX SEND QC (RANDOM) | :TQ10002 | 1 | 1128 | 12433 (2)| 00:02:30 | | | Q1,02 | P->S | QC (RAND) | | 4 | VIEW | | | | | | | | Q1,02 | PCWP | | |* 5 | HASH JOIN OUTER | | 1 | 1128 | 12433 (2)| 00:02:30 | | | Q1,02 | PCWP | | | 6 | PX RECEIVE | | 1 | 687 | 2 (0)| 00:00:01 | | | Q1,02 | PCWP | | | 7 | PX SEND HASH | :TQ10001 | 1 | 687 | 2 (0)| 00:00:01 | | | Q1,01 | P->P | HASH | | 8 | PX BLOCK ITERATOR | | 1 | 687 | 2 (0)| 00:00:01 | KEY | KEY | Q1,01 | PCWC | | | 9 | TABLE ACCESS FULL | TBL1 | 1 | 687 | 2 (0)| 00:00:01 | 2 | 2 | Q1,01 | PCWP | | | 10 | BUFFER SORT | | | | | | | | Q1,02 | PCWC | | | 11 | PX RECEIVE | | 723K| 368M| 12428 (2)| 00:02:30 | | | Q1,02 | PCWP | | | 12 | PX SEND HASH | :TQ10000 | 723K| 368M| 12428 (2)| 00:02:30 | | | | S->P | HASH | | 13 | PARTITION LIST SINGLE| | 723K| 368M| 12428 (2)| 00:02:30 | KEY | KEY | | | | | 14 | TABLE ACCESS FULL | TGT2 | 723K| 368M| 12428 (2)| 00:02:30 | 2 | 2 | | | | ------------------------------------------------------------------------------------------------------------------------------------------------- Predicate Information (identified by operation id): --------------------------------------------------- 5 - access("TGT2"."PKEY"(+)="TBL1"."PKEY" AND "TGT2"."accnt_id"(+)="TBL1"."accnt_id" AND "TGT2"."srvc_id"(+)="TBL1"."srvc_id")
max71 wrote:
How about if I comment last line? Shouldn't it work?Yes, who suggested several times already. If you omit the IN clause to your TGT2 table, then he can use the hash join.
This limitation is legitimate, or it could be a bug?
You must ask about it to Oracle. I would say that it is a limitation.
Means that you can use the MERGE statement with the hash join (select similar) when there are several partitioned in question (i.e. the Clause IN)
This means that you can not use more effective hash outer join operation if you use an IN / expression of GOLD as part of the outer join. In your particular case, it is the affected partitions. If you omit this part of your clause however WE can use the join of hash with multiple partitions.
As I already mentioned you can reproduce the problem without any partitioning involved.
Kind regards
RandolfOracle related blog stuff:
http://Oracle-Randolf.blogspot.com/SQLTools ++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676 /.
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