Re: row-attribute in EXPLAIN-output doesn't match count(*)

From: Markus Schaber <schabi(at)logix-tt(dot)com>
To: Andreas Joseph Krogh <andreak(at)officenet(dot)no>
Cc: Andrew Sullivan <ajs(at)crankycanuck(dot)ca>, pgsql-sql(at)postgresql(dot)org
Subject: Re: row-attribute in EXPLAIN-output doesn't match count(*)
Date: 2005-04-15 16:22:32
Message-ID: 425FEA48.20805@logix-tt.com
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Hi, Andreas,

Andreas Joseph Krogh schrieb:

>>>So, what you're suggesting is that a restart of the webapp should make
>>>vacuum able to delete those dead rows?
>>Yes, but that'll only solve your problem for now. You'll have the
>>problem again soon. What's keeping open the transaction?
> Don't know... All my web-apps semm to have *one* line each in "ps" which says
> "dbuser dbname 127.0.0.1 idle in transaction". Those are java-web-apps which
> get their connections from a connection-pool(Apache-Commons ConnectionPool),
> but there is exactly *one* line pr. web-app which has the "idle in
> transaction" line, even tho they have many connections open each.
> Any hints on how I can find out what's keeping the connection idle in a
> transaction? I realize now that I should probably ask that question on the
> pgsql-jdbc-list:-)

Could you try the latest postgresql-8.0-311.jdbcX.jar? The current
versions should solve the idle in transaction problem, the previous ones
tended to issue BEGIN; just after every COMMIT, so there's always an
open transaction.

Markus

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