Already logging to debuglog.txt.
Already logging to debuglog.txt.
#0  0x00007f7403dedec7 in semop () from /lib/libc.so.6
#1  0x00007f7405b77d91 in PGSemaphoreLock (sema=0x7f73ff65cd10, 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  0x00007f7405a0dec2 in XLogBackgroundFlush () at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/access/transam/xlog.c:2979
#5  0x00007f7405b8dc0e in WalWriterMain () at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/postmaster/walwriter.c:288
#6  0x00007f7405a1f595 in AuxiliaryProcessMain (argc=<optimized out>, argv=0x7ffff1c22830) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/bootstrap/bootstrap.c:438
#7  0x00007f7405b86f3b in StartChildProcess (type=WalWriterProcess) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/postmaster/postmaster.c:5155
#8  0x00007f7405b8956a in reaper (postgres_signal_arg=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/postmaster/postmaster.c:2644
#9  <signal handler called>
#10 0x00007f7403de6033 in select () from /lib/libc.so.6
#11 0x00007f7405b8b6e8 in ServerLoop () at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/postmaster/postmaster.c:1561
#12 PostmasterMain (argc=0, argv=<optimized out>) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/postmaster/postmaster.c:1244
#13 0x00007f7405b1e474 in main (argc=5, argv=0x7f7407809910) at /tmp/buildd/postgresql-9.4-9.4.4/build/../src/backend/main/main.c:228
Detaching from program: /usr/lib/postgresql/9.4/bin/postgres, process 5323
