Various runtime issues

Hello,

I have some questions regarding long-term use of Squid. I have had a
cache running for about 1 month now. Specs are PentiumIII/500Mhz, 512MB
RAM, 13Gig cache directory. Linux 2.2.13. My Byte-Hit ratio used to be
between 25-30%, and would peak at around 40%, however in the last 2
weeks it hasn't really gone over 25%. It more often than not hovers at
20-22%. My LRU is about 2.9 days.

I have set my cache_mem value to many settings, and 200MB seems to let
squid run happily. Should I increase/decrease this value, and if so,
why?

I would also be interested in knowing if adding another 18Gig of disk
space will improve my byte hit ratio. Should I add disk space, should I
also add some more RAM?

For the sake of this email, I have included my cachemanager general
info. See below.

All comments are welcome!

Thanks in advance,

Chris

Connection information for squid:
        Number of clients accessing cache: 556
        Number of HTTP requests received: 948590
        Number of ICP messages received: 0
        Number of ICP messages sent: 0
        Number of queued ICP replies: 0
        Request failure ratio: 0.00%
        HTTP requests per minute: 1550.5
        ICP messages per minute: 0.0
        Select loop called: 6762886 times, 5.428 ms avg
Cache information for squid:
        Request Hit Ratios: 5min: 49.3%, 60min: 46.3%
        Byte Hit Ratios: 5min: 23.7%, 60min: 24.7%
        Storage Swap size: 13016832 KB
        Storage Mem size: 194452 KB
        Storage LRU Expiration Age: 2.88 days
        Mean Object Size: 10.30 KB
        Requests given to unlinkd: 163004
Median Service Times (seconds) 5 min 60 min:
        HTTP Requests (All): 0.06640 0.08265
        Cache Misses: 0.24524 0.25890
        Cache Hits: 0.01309 0.01387
        Near Hits: 0.17711 0.19742
        Not-Modified Replies: 0.00865 0.00919
        DNS Lookups: 0.01153 0.01046
        ICP Queries: 0.00000 0.00000
Resource usage for squid:
        UP Time: 36707.702 seconds
        CPU Time: 5931.630 seconds
        CPU Usage: 16.16%
        CPU Usage, 5 minute avg: 19.79%
        CPU Usage, 60 minute avg: 22.00%
        Maximum Resident Size: 0 KB
        Page faults with physical i/o: 79463
Memory usage for squid via mallinfo():
        Total space in arena: 355272 KB
        Ordinary blocks: 351082 KB 4025 blks
        Small blocks: 0 KB 0 blks
        Holding blocks: 2876 KB 3 blks
        Free Small blocks: 0 KB
        Free Ordinary blocks: 4190 KB
        Total in use: 353958 KB 100%
        Total free: 4190 KB 1%
Memory accounted for:
        Total accounted: 313912 KB
File descriptor usage for squid:
        Maximum number of file descriptors: 4096
        Largest file desc currently in use: 448
        Number of file desc currently in use: 309
        Files queued for open: 0
        Available number of file descriptors: 3787
        Reserved number of file descriptors: 100
        Store Disk files open: 13
Internal Data Structures:
        1265666 StoreEntries
         38975 StoreEntries with MemObjects
         38905 Hot Object Cache Items
        1263999 Filemap bits set
        1263994 on-disk objects
Received on Tue Jan 11 2000 - 18:49:30 MST