Re: Autovacuum daemon terminated by signal 11

Tom Lane wrote:
> Having debug symbols would be more useful, but unless the binary is
> totally stripped, a backtrace might provide enough info without that.
> Try it and see if you get any function names in the trace, or only
> numbers.
>
> (BTW, does Debian have anything comparable to Red Hat's debuginfo
> packages? You might be able to get the debug symbols without having
> to recompile for yourself. Recompile is a bit of a pain since you have
> to take care to match the original compilation options exactly.)
>
> regards, tom lane

Alrighty. Here's what I got (assuming I did this right). My untrained
eyes see some stuff regarding memory allocation. I wonder if overly
aggressive memory related tweaks in the config file are causing the
problem? I don't recall making any changes to the config file within a
short time period of the problem starting, but let me know if I need to
post any config settings.

hostname:/var/lib/postgresql/8.1/mc-db2# gdb
/usr/lib/postgresql/8.1/bin/postmaster core
GNU gdb 6.4.90-debian
Copyright (C) 2006 Free Software Foundation, Inc.
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Type "show copying" to see the conditions.
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This GDB was configured as "i486-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".

warning: Can't read pathname for load map: Input/output error.
Reading symbols from /lib/libpam.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib/libpam.so.0
Reading symbols from /usr/lib/i686/cmov/libssl.so.0.9.8...(no debugging
symbols found)...done.
Loaded symbols for /usr/lib/i686/cmov/libssl.so.0.9.8
Reading symbols from /usr/lib/i686/cmov/libcrypto.so.0.9.8...(no
debugging symbols found)...done.
Loaded symbols for /usr/lib/i686/cmov/libcrypto.so.0.9.8
Reading symbols from /usr/lib/libkrb5.so.3...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libkrb5.so.3
Reading symbols from /lib/libcom_err.so.2...(no debugging symbols
found)...done.
Loaded symbols for /lib/libcom_err.so.2
Reading symbols from /lib/tls/i686/cmov/libcrypt.so.1...
(no debugging symbols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libcrypt.so.1
Reading symbols from /lib/tls/i686/cmov/libdl.so.2...(no debugging
symbols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libdl.so.2
Reading symbols from /lib/tls/i686/cmov/libm.so.6...(no debugging
symbols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libm.so.6
Reading symbols from /lib/tls/i686/cmov/libc.so.6...(no debugging
symbols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libc.so.6
Reading symbols from /usr/lib/libz.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /usr/lib/libk5crypto.so.3...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libk5crypto.so.3
Reading symbols from /lib/tls/i686/cmov/libresolv.so.2...(no debugging
symbols found)...done.
Loaded symbols for /lib/tls/i686/cmov/libresolv.so.2
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols
found)...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /usr/lib/libkrb5support.so.0...(no debugging
symbols found)...done.
Loaded symbols for /usr/lib/libkrb5support.so.0
(no debugging symbols found)
Core was generated by `postgres: autovacuum process
mc_dairyqueen '.
Program terminated with signal 11, Segmentation fault.
#0 0x0827441d in MemoryContextAlloc ()
(gdb) bt
#0 0x0827441d in MemoryContextAlloc ()
#1 0x08274467 in MemoryContextStrdup ()
#2 0x0826501c in database_getflatfilename ()
#3 0x0826504e in database_getflatfilename ()
#4 0x08265ec1 in AtEOXact_UpdateFlatFiles ()
#5 0x080a9111 in RecordTransactionCommit ()
#6 0x080a93a7 in CommitTransactionCommand ()
#7 0x081a6c3b in autovac_stopped ()
#8 0x081a75cd in autovac_start ()
#9 0x081ae33c in ClosePostmasterPorts ()
#10 0x081af058 in PostmasterMain ()
#11 0x0816b3e2 in main ()