9.1.1 crash

[Mike Blackwell <mike.blackwell@xxxxxxx>]

The following are the relevant log entries from a recent crash of v9.1.1 running on an older RHEL Linux box.  This is the first crash we've experienced in a lot of years of running Pg.  Any assistance in how to determine what might have caused this is welcome.

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2012-02-10 13:55:59 CST [15949]: [37-1] @ LOG:  00000: server process (PID 32670) was terminated by signal 11: Segmentation fault

2012-02-10 13:55:59 CST [15949]: [38-1] @ LOCATION:  LogChildExit, postmaster.c:2881

2012-02-10 13:55:59 CST [15949]: [39-1] @ LOG:  00000: terminating any other active server processes

2012-02-10 13:55:59 CST [15949]: [40-1] @ LOCATION:  HandleChildCrash, postmaster.c:2695

2012-02-10 13:55:59 CST [15949]: [41-1] @ LOG:  00000: all server processes terminated; reinitializing

2012-02-10 13:55:59 CST [15949]: [42-1] @ LOCATION:  PostmasterStateMachine, postmaster.c:3116

2012-02-10 13:56:00 CST [3303]: [1-1] @ LOG:  00000: database system was interrupted; last known up at 2012-02-10 13:54:18 CST

2012-02-10 13:56:00 CST [3303]: [2-1] @ LOCATION:  StartupXLOG, xlog.c:6046

2012-02-10 13:56:00 CST [3303]: [3-1] @ LOG:  00000: database system was not properly shut down; automatic recovery in progress

2012-02-10 13:56:00 CST [3303]: [4-1] @ LOCATION:  StartupXLOG, xlog.c:6299

2012-02-10 13:56:00 CST [3303]: [5-1] @ LOG:  00000: consistent recovery state reached at F/FC9C7588

2012-02-10 13:56:00 CST [3303]: [6-1] @ LOCATION:  CheckRecoveryConsistency, xlog.c:6958

2012-02-10 13:56:00 CST [3303]: [7-1] @ LOG:  00000: redo starts at F/FC9A5BA8

2012-02-10 13:56:00 CST [3303]: [8-1] @ LOCATION:  StartupXLOG, xlog.c:6506

2012-02-10 13:56:00 CST [3303]: [9-1] @ LOG:  00000: record with zero length at F/FCC716F0

2012-02-10 13:56:00 CST [3303]: [10-1] @ LOCATION:  ReadRecord, xlog.c:3829

2012-02-10 13:56:00 CST [3303]: [11-1] @ LOG:  00000: redo done at F/FCC716B4

2012-02-10 13:56:00 CST [3303]: [12-1] @ LOCATION:  StartupXLOG, xlog.c:6621

2012-02-10 13:56:00 CST [3303]: [13-1] @ LOG:  00000: last completed transaction was at log time 2012-02-10 13:55:59.452228-06

2012-02-10 13:56:00 CST [3303]: [14-1] @ LOCATION:  StartupXLOG, xlog.c:6626

2012-02-10 13:56:02 CST [3319]: [1-1] @ LOG:  00000: autovacuum launcher started

2012-02-10 13:56:02 CST [3319]: [2-1] @ LOCATION:  AutoVacLauncherMain, autovacuum.c:404

2012-02-10 13:56:02 CST [15949]: [43-1] @ LOG:  00000: database system is ready to accept connections

2012-02-10 13:56:02 CST [15949]: [44-1] @ LOCATION:  reaper, postmaster.c:2435