squid keeps dying

I have a 16.g cache that keeps on restarting once its validated its cache,
at least that what i believe happens.. can anyone explain the below errors
in cache.log to me

1999/02/20 14:12:58| Ready to serve requests.
FATAL: Received Segment Violation...dying.
1999/02/20 14:16:12| Not currently OK to rewrite swap log.
1999/02/20 14:16:12| storeDirWriteCleanLogs: Operation aborted.
CPU Usage: 83.000 seconds
Maximum Resident Size: 0 KB
Page faults with physical i/o: 17580
Memory usage for squid via mallinfo():
        total space in arena: 12707 KB
        Ordinary blocks: 12644 KB 912 blks
        Small blocks: 0 KB 0 blks
        Holding blocks: 304 KB 2 blks
        Free Small blocks: 0 KB
        Free Ordinary blocks: 63 KB
        Total in use: 12948 KB 102%
        Total free: 63 KB 1%
1999/02/20 14:16:15| Starting Squid Cache version 2.1.PATCH2 for
i486-pc-linux-g
nu...
1999/02/20 14:16:15| Process ID 2262
1999/02/20 14:16:15| With 1000 file descriptors available
1999/02/20 14:16:15| Performing DNS Tests...

thanks

- Matthew Lowe
Dataline Tech Support
support@dataline.net.au
Received on Fri Feb 19 1999 - 21:01:42 MST