On 12/23/12 3:17 PM, Simon Riggs wrote:
If that last change was the cause, then its caused within VACUUM. I'm
running a thrash test with autovacuums set much more frequently but
nothing yet.

I am not very suspicious of that VACUUM change; just pointed it out for completeness sake.

Are you by any chance running with unlogged tables? There was a change
there recently, something around checkpoint IIRC. Can you set
checkpoints more frequent also?

This is straight pgbench, modifying only scale, client count, workers, and duration. No unlogged tables involved.

The crash is so intermittent that I'm trying not to change anything until I get more productive output out of one. The last run I kicked off has been chugging for 14 hours without a hiccup yet.

--
Greg Smith   2ndQuadrant US    g...@2ndquadrant.com   Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support www.2ndQuadrant.com


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