Hi, @all,
Greg Stark schrieb:
> "Leeuw van der, Tim" <[EMAIL PROTECTED]> writes:
>
>>I don't think EXPLAIN ANALYZE puts that much overhead on a query.
>
> EXPLAIN ANALYZE does indeed impose a significant overhead.
Additional note:
In some rare cases, you can experience just the opposite effect,
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> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Steven Rosenstein
> >> I don't think EXPLAIN ANALYZE puts that much overhead on a query.
I think you're being overly optimistic. The explain shows that the
Materialize subnode is being entered upwards of 32 million times:
-> Mater
"Leeuw van der, Tim" <[EMAIL PROTECTED]> writes:
> I don't think EXPLAIN ANALYZE puts that much overhead on a query.
EXPLAIN ANALYZE does indeed impose a significant overhead. What percentage of
the time is overhead depends heavily on how much i/o the query is doing.
For queries that are primar
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Steven Rosenstein
Sent: Sunday, February 06, 2005 8:51 PM
To: pgsql-performance@postgresql.org
Subject: [PERFORM] Can the V7.3 EXPLAIN ANALYZE be trusted?
While working on a previous question I posed to
While working on a previous question I posed to this group, I ran a number
of EXPLAIN ANALYZE's to provide as examples. After sending up my last
email, I ran the same query *without* EXPLAIN ANALYZE. The runtimes were
vastly different. In the following example, I ran two identical queries
on
