Huge variation in LRU

I am seeing huge variations in LRU Expiration times. Here is what I
just pulled from cachemgr.cgi ... 20 minutes ago the LRU number was above
10 days now it's between 4 and 5 . Earlier this morning I saw the LRU
between 3 and 4. How can it fluctuate so greatly ... is something wrong???

TIA,

Fraser

Squid Object Cache: Version 1.1.17
Start Time: Sun, 15 Mar 1998 14:28:01 GMT
Current Time: Fri, 20 Mar 1998 21:49:41 GMT
Connection information for squid:
        Number of TCP connections: 193355
        Number of UDP connections: 0
        Connections per hour: 1518.2
        Select loop called: 3174371 times, 144.438 ms avg
Cache information for squid:
        Storage Swap size: 693 MB
        Storage Mem size: 10465 KB
        Storage LRU Expiration Age: 4.22 days
        Requests given to unlinkd: 6590
        Unused fileno stack count: 17

*****************************************************************
* Fraser M. Campbell, Hanover, Ontario, Canada N4N 3C4 *
* Email: fraser@greynet.net Phone: (519) 364-6115 *
* http://www.greynet.net/fraser/ *
*****************************************************************
Received on Fri Mar 20 1998 - 13:53:43 MST