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Hi, I want to backup my postgresql database but it fails because it is looking for some wal files on pg_wal directory. Before backup I checked my pg_wal directory and I saw the wal file, bash-4.2$ cd /pgdata/pgsql/data/pg_wal bash-4.2$ ls -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000AE -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000AF -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B0 -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B1 -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B2 -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B3 -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B4 -rw------- 1 postgres postgres 16777216 Jun 24 01:16 000000010000000A000000B5 -rw------- 1 postgres postgres 16777216 Jun 24 01:31 000000010000000A000000B6 -rw------- 1 postgres postgres 16777216 Jun 24 01:46 000000010000000A000000B7 But backup fails with, Failed to open: /pgdata//pgsql/data/pg_wal/000000010000000A000000AE Error! The backup has failed. After I checked pg_wal directory and really there is no such file, it was not appear on disk. What can I do for this? Please help.. bash-4.2$ cd /pgdata/pgsql/data/pg_wal bash-4.2$ ls -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000AF -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B0 -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B1 -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B2 -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B3 -rw------- 1 postgres postgres 16777216 Jun 24 01:01 000000010000000A000000B4 -rw------- 1 postgres postgres 16777216 Jun 24 01:16 000000010000000A000000B5 -rw------- 1 postgres postgres 16777216 Jun 24 01:31 000000010000000A000000B6 -rw------- 1 postgres postgres 16777216 Jun 24 01:46 000000010000000A000000B7 -rw------- 1 postgres postgres 16777216 Jun 24 02:01 000000010000000A000000B8 Regards, Some of my parameters on postgresql.conf file; wal_buffers = 16MB max_wal_size = 5GB min_wal_size = 2GB shared_buffers = 4GB max_wal_senders = 10 wal_level = replica
wal_keep_segments = 50 archive_mode = on # enables archiving; off, on, or always archive_command = 'cp %p /pgdata/arc' # command to use to archive a logfile segment archive_timeout =0 # force a logfile segment switch after this
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