Re: Problem of pg_wal filling up

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От Jeff Janes
Тема Re: Problem of pg_wal filling up
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Msg-id CAMkU=1z4wkc02f1BHS448ybB83Fp5OhO=kaw4=wu+S1M7iZtZg@mail.gmail.com
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Ответ на Problem of pg_wal filling up  (<soumik.bhattacharjee@kpn.com>)
Ответы RE: Problem of pg_wal filling up  (<soumik.bhattacharjee@kpn.com>)
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On Fri, Jan 31, 2020 at 11:20 AM <soumik.bhattacharjee@kpn.com> wrote:

Dear Experts,

 

Post the setup of streaming replication –MASTER and one SLAVE in PostgreSQL 12 , the pg_wal in both MASTER/SLAVE are - filling up.


Do you have any replication slots on the replica?  When you created the replica, you were supposed to exclude the directory pg_replslot.  If you didn't the replica might have "inherited" slots it should not have.
 

 

My MASTER is in archive log mode and SLAVE in no archive log mode.

 

MASTER

 

postgres=# show archive_command;

                                  archive_command

------------------------------------------------------------------------------------

test ! -f /data/tablespaces/archivedir/%f && cp %p /data/tablespaces/archivedir/%f


Is this command succeeding?  Do you see messages in the log file about it failing?  Are new files showing up in '/data/tablespaces/archivedir/'?

Does the master have any old replication slots which have been abandoned or are falling behind?  Check the view pg_replication_slots.  

 

Is it advisable to change  default wal location (pg_wal)? Or any other options apart from using pg_archivecleanup?


pg_archivecleanup is for cleaning up the archive (which is apparently '/data/tablespaces/archivedir/').  It is *not* for cleaning up pg_wal.

Cheers,

Jeff

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