Re: Performance with the new security release?

On 13-04-22 01:38 PM, Anne Rosset wrote:
> Hi,
> We are seeing some overall performance degradation in our application
> since we installed the security release. Other commits were also done
> at the same time in the application so we don't know yet if the
> degradation has any relationship with the security release.
>
> While we are digging into this, I would like to know if it is possible
> that the release has some impact on performance. After reading this
> "It was created as a side effect of a refactoring effort to make
> establishing new connections to a PostgreSQL server faster, and the
> associated code more maintainable.", I am thinking it is quite possible.
>
> Please let me know. Thanks,

Exactly which version of PostgreSQL are you running? (we released
security update releases for multiple PG versions). Also which version
were you running before?

There were some changes to analyze/vacuum in the previous set of minor
releases that could cause performance issues in some cases (ie if
statistics are no longer being updated because analyze can't get the
exclusive lock for truncation). There might be other unintended
performance related changes.

Are all queries taking longer or only some? Can you find any sort of
pattern that might help narrow the issue?

Steve

> Anne
>
>