On Mon, 2021-04-26 at 17:45 -0400, Mike Beachy wrote: > Does anyone have any pointers on what a virtualtransaction of '-1/0' means? > > I'm using SSI and an example is > > locktype | database | relation | page | tuple | virtualxid | transactionid | classid | objid | objsubid | virtualtransaction | pid | mode | granted | fastpath > ----------+----------+----------+---------+-------+------------+---------------+---------+-------+----------+--------------------+-----+------------+---------+---------- > page | 16384 | 468238 | 19216 | | | | | | | -1/0 | | SIReadLock | t | f > > This is incredibly hard to search for. > > I see these for page, tuple and (perhaps a clue?) one relation, and I'm seeing the page and tuple locks accumulate over time. > Eventually this results in an "out of shared memory" error. Not sure, but do you see prepared transactions in "pg_prepared_xacts"? Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com
