Re: isolation check takes a long time - Mailing list pgsql-hackers

From Alvaro Herrera
Subject Re: isolation check takes a long time
Date
Msg-id 1342218222-sup-8473@alvh.no-ip.org
Whole thread Raw
In response to isolation check takes a long time  (Andrew Dunstan <andrew@dunslane.net>)
Responses Re: isolation check takes a long time  (Andrew Dunstan <andrew@dunslane.net>)
List pgsql-hackers
Excerpts from Andrew Dunstan's message of vie jul 13 16:05:37 -0400 2012:
> Why does the isolation check take such a long time? On some of my slower
> buildfarm members I am thinking of disabling it because it takes so
> long. This single test typically takes longer than a full serial
> standard regression test. Is there any way we could make it faster?

I think the "prepared transactions" test is the one that takes the
longest.  Which is a shame when prepared xacts are not enabled, because
all it does is throw millions of "prepared transactions are not enabled"
errors.  There is one other test that takes very long because it commits
a large amount of transactions.  I found it to be much faster if run
with fsync disabled.

Maybe it'd be a good idea to disable fsync on buildfarm runs, if we
don't already do so?

--
Álvaro Herrera <alvherre@commandprompt.com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support


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