Re: PATCH: Split stats file per database WAS: autovacuum stress-testing our system

On Sat, Feb 2, 2013 at 2:33 PM, Jeff Janes <jeff(dot)janes(at)gmail(dot)com> wrote:
> On Sat, Jan 5, 2013 at 8:03 PM, Tomas Vondra <tv(at)fuzzy(dot)cz> wrote:
>> On 3.1.2013 20:33, Magnus Hagander wrote:
>>>
>>> Yeah, +1 for a separate directory not in global.
>>
>> OK, I moved the files from "global/stat" to "stat".
>
> This has a warning:
>
> pgstat.c:5132: warning: 'pgstat_write_statsfile_needed' was used with
> no prototype before its definition
>
> I plan to do some performance testing, but that will take a while so I
> wanted to post this before I get distracted.

Running "vacuumdb -a" on a cluster with 1000 db with 200 tables (x
serial primary key) in each, I get log messages like this:

last_statwrite 23682-06-18 22:36:52.960194-07 is later than
collector's time 2013-02-03 12:49:19.700629-08 for db 16387

Note the bizarre year in the first time stamp.

If it matters, I got this after shutting down the cluster, blowing
away $DATA/stat/*, then restarting it and invoking vacuumdb.

Cheers,

Jeff