Uwe Bartels <uwe.bart...@gmail.com> writes:
> i'm pretty sure there is no repetitive ddl happen on this or any other
> table. i checked this with the developers.
Well, *something* was blocking that RowExclusiveLock request, and for
sure it wasn't autovacuum. There has to be something else going on.
> but if i had an anti-wraparound vacuum, then i should see warnings like
> these in the log. am i right? I don't have any warnings that day.
> WARNING: database "mydb" must be vacuumed within 177009986 transactions
> HINT: To avoid a database shutdown, execute a database-wide VACUUM in "mydb".
Uh, no. Anti-wraparound vacuums are performed long before you would get
to the point of seeing any actual warnings.
regards, tom lane
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