Re: [HACKERS] Continuous buildfarm failures on hamster with bin-check

Hi,

On 2017-04-18 16:07:38 +0900, Michael Paquier wrote:
> Some of you may have noticed that hamster is heavily red on the
> buildfarm. I have done a bit of investigation, and I am able to
> reproduce the failure manually. But actually after looking at the logs
> the error has obviously showed up:
> 2017-04-16 05:07:19.650 JST [18282] LOG:  database system is ready to
> accept connections
> 2017-04-16 05:08:36.725 JST [18296] LOG:  using stale statistics
> instead of current ones because stats collector is not responding
> 2017-04-16 05:10:22.207 JST [18303] t/010_pg_basebackup.pl LOG:
> terminating walsender process due to replication timeout
> 2017-04-16 05:10:30.180 JST [18306] LOG:  using stale statistics
> instead of current ones because stats collector is not responding
> 
> Stale regressions means that the system is just constrained so much
> that things are timing out.
> 
> In order to avoid such failures with normal regression tests, I have
> set up extra_config so as stats_temp_directory goes to a tmpfs to
> avoid stale statistics

How high do you need to make the hardcoded limit for this to succeed
without a tmpfs?  If hamster fails this regularly I think we have to do
something about it, rather than paper over it.  What's the storage
situation currently like?

Greetings,

Andres Freund