affected by queries like these.
Stalin
-Original Message-
From: Kevin Grittner [mailto:kevin.gritt...@wicourts.gov]
Sent: Tuesday, August 04, 2009 8:57 AM
To: Subbiah Stalin-XCGF84; pgsql-performance@postgresql.org
Subject: RE: [PERFORM] Query help
Subbiah Stalin-XCGF84 ssubb...@motorola.com
-
From: Kevin Grittner [mailto:kevin.gritt...@wicourts.gov]
Sent: Tuesday, August 04, 2009 8:57 AM
To: Subbiah Stalin-XCGF84; pgsql-performance@postgresql.org
Subject: RE: [PERFORM] Query help
Subbiah Stalin-XCGF84 ssubb...@motorola.com wrote:
Server has 32G memory and it's a dedicated to run PG
Subbiah Stalin-XCGF84 ssubb...@motorola.com wrote:
We have found the problem.
Great news!
Apparently there was a query doing count on 45 million rows table
run prior to the episode of slow query. Definitely cached data is
pushed out the memory.
Yeah, that would completely explain your
necessary stats on the next occurrence of the slow
query.
Stalin
-Original Message-
From: Kevin Grittner [mailto:kevin.gritt...@wicourts.gov]
Sent: Tuesday, August 04, 2009 8:57 AM
To: Subbiah Stalin-XCGF84; pgsql-performance@postgresql.org
Subject: RE: [PERFORM] Query help
Subbiah Stalin
All,
Not sure what's wrong in below execution plan but at times the query
runs for 5 minutes to complete and after a while it runs within a second
or two.
Here is explain analyze out of the query.
SELECT
OBJECTS.ID,OBJECTS.NAME,OBJECTS.TYPE,OBJECTS.STATUS,OBJECTS.ALTNAME,OBJE
Subbiah Stalin-XCGF84 ssubb...@motorola.com wrote:
Not sure what's wrong in below execution plan but at times the query
runs for 5 minutes to complete and after a while it runs within a
second or two.
The plan doesn't look entirely unreasonable for the given query,
although it's hard to be
] Query help
Subbiah Stalin-XCGF84 ssubb...@motorola.com wrote:
Not sure what's wrong in below execution plan but at times the query
runs for 5 minutes to complete and after a while it runs within a
second or two.
The plan doesn't look entirely unreasonable for the given query,
although
Subbiah Stalin-XCGF84 ssubb...@motorola.com wrote:
Shared buffer=8G, effective cache size=4G.
That is odd; if your shared buffers are at 8G, you must have more than
4G of cache. How much RAM is used for cache at the OS level?
Normally you would add that to the shared buffers to get your
:45 PM
To: Subbiah Stalin-XCGF84; pgsql-performance@postgresql.org
Subject: RE: [PERFORM] Query help
Subbiah Stalin-XCGF84 ssubb...@motorola.com wrote:
Shared buffer=8G, effective cache size=4G.
That is odd; if your shared buffers are at 8G, you must have more than
4G of cache. How much RAM
