store_avg_object_size

What exactly is the store_avg_object_size?

I recently got a message in my cache.log that said:
1998/11/07 15:53:49| WARNING: All 15752 swap files are in use.
1998/11/07 15:53:49| You should probably use a lower value for
1998/11/07 15:53:49| 'store_avg_object_size' in squid.conf
1998/11/07 15:53:49| WARNING: storeOpenSwapFileRead: bad swap_file_number
1998/11/07 15:53:49| Swapfile open failed
1998/11/07 15:53:50| WARNING: storeOpenSwapFileRead: bad swap_file_number
1998/11/07 15:53:50| Swapfile open failed
FATAL: file_write: bad FD

It was preceeded by a bunch of stuff like this:

1998/11/07 12:52:37| file_open: error opening file
/usr/local/squid/cache/0F/0E/000010EF: (2) No such file or directory
1998/11/07 12:52:37| storeOpenSwapFileRead: Failed for
'http://www.sap.com/uk/images/home_hd.gif'
1998/11/07 12:52:49| file_open: error opening file
/usr/local/squid/cache/0D/61/0000161D: (2) No such file or directory
1998/11/07 12:52:49| storeOpenSwapFileRead: Failed for
'http://www.amd.com/K6/images/k6green.gif'
1998/11/07 12:53:03| file_open: error opening file
/usr/local/squid/cache/0A/38/0000138A: (2) No such file or directory
1998/11/07 12:53:03| storeOpenSwapFileRead: Failed for
'http://www.sap.com/uk/images/sapuk.gif'
1998/11/07 12:55:35| WARNING: Exceeded 'cache_swap' high water mark (97284K >
97280K)

-- 
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Rodney D. Holm                  rodneyh@apexxtech.com
Apexx Technology, Inc.          http://www.apexxtech.com
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