Rob Sargent <robjsargent@gmail.com> writes:
> On 4/19/22 00:06, David G. Johnston wrote:
>> On Monday, April 18, 2022, bhargav kamineni <kbn98406@gmail.com> wrote:
>> It seems vacuum is behaving somewhat weird on postgres database ,
>> observing below HINTS on the vacuum logs
>> WARNING: oldest xmin is far in the past
> This site has lots of useful queries for this sort of issue:
> https://www.shanelynn.ie/postgresql-find-slow-long-running-and-blocked-queries.
> I think you're looking for a very old transaction that is probably not
> going to finish, must be terminated.
Yeah, that. Manual vacuuming isn't going to help until you get rid
of the old open transaction. Look into pg_prepared_xacts and
pg_stat_activity.
regards, tom lane
