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cache manager output

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Dear SQUID-expert frens, 
We are experiencing slowness in surfing here. Just
want to find out, Which part of the cache manager
output that I should look into to check whether or not
the problems lies within SQUID. Kindly help.

Squid Object Cache: Version 2.5.STABLE12
Start Time: Tue, 26 Sep 2006 23:03:44 GMT 
Current Time: Wed, 27 Sep 2006 01:10:45 GMT 

Connection information for squid:
	Number of clients accessing cache:	0
	Number of HTTP requests received:	49119
	Number of ICP messages received:	0
	Number of ICP messages sent:	0
	Number of queued ICP replies:	0
	Request failure ratio:	 0.00
	Average HTTP requests per minute since start:	386.7
	Average ICP messages per minute since start:	0.0
	Select loop called: 487089 times, 15.645 ms avg
Cache information for squid:
	Request Hit Ratios:	5min: 43.3%, 60min: 43.5%
	Byte Hit Ratios:	5min: 19.1%, 60min: 24.1%
	Request Memory Hit Ratios:	5min: 6.1%, 60min: 2.2%
	Request Disk Hit Ratios:	5min: 36.1%, 60min: 26.8%
	Storage Swap size:	30048680 KB
	Storage Mem size:	11688 KB
	Mean Object Size:	23.17 KB
	Requests given to unlinkd:	887
Median Service Times (seconds)  5 min    60 min:
	HTTP Requests (All):   1.46131  0.94847
	Cache Misses:         24.21863 10.20961
	Cache Hits:            0.00286  0.00463
	Near Hits:            24.21863 12.00465
	Not-Modified Replies:  0.00379  0.00286
	DNS Lookups:           0.00000  0.00000
	ICP Queries:           0.00000  0.00000
Resource usage for squid:
	UP Time:	7620.750 seconds
	CPU Time:	95.623 seconds
	CPU Usage:	1.25%
	CPU Usage, 5 minute avg:	2.23%
	CPU Usage, 60 minute avg:	1.86%
	Process Data Segment Size via sbrk(): 144188 KB
	Maximum Resident Size: 0 KB
	Page faults with physical i/o: 0
Memory usage for squid via mallinfo():
	Total space in arena:  144188 KB
	Ordinary blocks:       143058 KB    483 blks
	Small blocks:               0 KB      0 blks
	Holding blocks:          1492 KB      4 blks
	Free Small blocks:          0 KB
	Free Ordinary blocks:    1129 KB
	Total in use:          144550 KB 99%
	Total free:              1129 KB 1%
	Total size:            145680 KB
Memory accounted for:
	Total accounted:       111448 KB
	memPoolAlloc calls: 12113723
	memPoolFree calls: 8161986
File descriptor usage for squid:
	Maximum number of file descriptors:   1024
	Largest file desc currently in use:    367
	Number of file desc currently in use:  314
	Files queued for open:                   0
	Available number of file descriptors:  710
	Reserved number of file descriptors:   100
	Store Disk files open:                  19
Internal Data Structures:
	1297267 StoreEntries
	  2494 StoreEntries with MemObjects
	  2387 Hot Object Cache Items
	1296981 on-disk objects


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