Hi, On 2023-09-28 07:53:45 +0900, Michael Paquier wrote: > On Wed, Sep 27, 2023 at 10:29:25AM -0700, Andres Freund wrote: > > Frankly, it seems like a quite bad idea to have such a high limit for > > pgstat_track_activity_query_size. The overhead such a high value has will > > surprise people... > > Still it could have some value for some users with large analytical > queries where the syslogger is not going to be a bottleneck? It seems > too late to me to change that, but perhaps the docs could be improved > to tell that using a too high value can have performance consequences, > while mentioning the maximum value.
I don't think the issue is syslogger, the problem is that suddenly accessing pg_stat_activity requires gigabytes of memory. That's insane. Greetings, Andres Freund
