On 2015-07-20 13:22:42 +0200, Andres Freund wrote: > Hm. The problem seems to be the WaitXLogInsertionsToFinish() call in > XLogFlush(). These are the relevant stack traces: db9lock/debuglog-commit.txt #2 0x00007f7405bd44f4 in LWLockWaitForVar (l=0x7f70f2ab6680, valptr=0x7f70f2ab66a0, oldval=<optimized out>, newval=0xffffffffffffffff) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/storage/lmgr/lwlock.c:1011 #3 0x00007f7405a0d3e6 in WaitXLogInsertionsToFinish (upto=121713318915952) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/transam/xlog.c:1755 #4 0x00007f7405a0e1d3 in XLogFlush (record=121713318911056) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/transam/xlog.c:2849 db9lock/debuglog-insert-8276.txt #1 0x00007f7405b77d91 in PGSemaphoreLock (sema=0x7f73ff6531d0, interruptOK=0 '\000') at pg_sema.c:421 #2 0x00007f7405bd4849 in LWLockAcquireCommon (val=<optimized out>, valptr=<optimized out>, mode=<optimized out>, l=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/storage/lmgr/lwlock.c:626 #3 LWLockAcquire (l=0x7f70ecaaa1a0, mode=LW_EXCLUSIVE) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/storage/lmgr/lwlock.c:467 #4 0x00007f7405a0dcca in AdvanceXLInsertBuffer (upto=<optimized out>, opportunistic=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/transam/xlog.c:2161 #5 0x00007f7405a0e301 in GetXLogBuffer (ptr=121713318928384) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/transam/xlog.c:1848 #6 0x00007f7405a0e9c9 in CopyXLogRecordToWAL (EndPos=<optimized out>, StartPos=<optimized out>, rdata=0x7ffff1c21b90, isLogSwitch=<optimized out>, write_len=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/transam/xlog.c:1494 #7 XLogInsert (rmid=<optimized out>, info=<optimized out>, rdata=<optimized out>) at /tmp/buildd/postgre -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
