squid网关服务器透明代理cache hit命中率很低，网关服务器丢包率也很高

vcdog

# squidclient -h host-squid-01 -p 3128 mgr:info  
HTTP/1.0 200 OK
Server: squid/2.6.STABLE21
Date: Tue, 26 Oct 2010 01:55:42 GMT
Content-Type: text/plain
Expires: Tue, 26 Oct 2010 01:55:42 GMT
Last-Modified: Tue, 26 Oct 2010 01:55:42 GMT
X-Cache: MISS from jrcz-gw-01
X-Cache-Lookup: MISS from jrcz-gw-01:3128
Via: 1.0 host-squid-01:3128 (squid/2.6.STABLE21)
Proxy-Connection: close

Squid Object Cache: Version 2.6.STABLE21
Start Time:     Mon, 25 Oct 2010 05:00:00 GMT
Current Time:   Tue, 26 Oct 2010 01:55:42 GMT
Connection information for squid:
        Number of clients accessing cache:      43
        Number of HTTP requests received:       213934
        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:   170.4
        Average ICP messages per minute since start:    0.0
        Select loop called: 3648381 times, 20.651 ms avg
Cache information for squid:
        Request Hit Ratios:     5min: 23.9%, 60min: 24.2%
        Byte Hit Ratios:        5min: 13.7%, 60min: 11.3%
        Request Memory Hit Ratios:      5min: 21.9%, 60min: 14.3%
        Request Disk Hit Ratios:        5min: 38.6%, 60min: 36.5%
        Storage Swap size:      1776760 KB
        Storage Mem size:       65488 KB
        Mean Object Size:       15.78 KB
        Requests given to unlinkd:      7510
Median Service Times (seconds)  5 min    60 min:
        HTTP Requests (All):   0.22004  0.35832
        Cache Misses:          0.35832  0.58309
        Cache Hits:            0.00091  0.00179    //怎么我的squid透明代理命中率这么低啊，只有0.091%－－0.179%？
        Near Hits:             0.22004  0.44492
        Not-Modified Replies:  0.00091  0.00091
        DNS Lookups:           0.11926  0.36346
        ICP Queries:           0.00000  0.00000
Resource usage for squid:
        UP Time:        75342.146 seconds
        CPU Time:       334.829 seconds
        CPU Usage:      0.44%
        CPU Usage, 5 minute avg:        1.70%
        CPU Usage, 60 minute avg:       2.01%
        Process Data Segment Size via sbrk(): 101516 KB
        Maximum Resident Size: 0 KB
        Page faults with physical i/o: 1
Memory usage for squid via mallinfo():
        Total space in arena:  101648 KB
        Ordinary blocks:       100744 KB    290 blks
        Small blocks:               0 KB      0 blks
        Holding blocks:           244 KB      1 blks
        Free Small blocks:          0 KB
        Free Ordinary blocks:     903 KB
        Total in use:          100988 KB 99%
        Total free:               903 KB 1%
        Total size:            101892 KB
Memory accounted for:
        Total accounted:        91028 KB
        memPoolAlloc calls: 28820306
        memPoolFree calls: 28166509
File descriptor usage for squid:
        Maximum number of file descriptors:   1024
        Largest file desc currently in use:    538
        Number of file desc currently in use:  320
        Files queued for open:                   0
        Available number of file descriptors:  704
        Reserved number of file descriptors:   100
        Store Disk files open:                   0
        IO loop method:                     epoll
Internal Data Structures:
        113092 StoreEntries
         13297 StoreEntries with MemObjects
         13261 Hot Object Cache Items
        112595 on-disk objects


***************************************************************
   Cache Hits:            0.00091  0.00179    //怎么我的squid透明代理命中率这么低啊，只有0.091%－－0.179%？
大虾帮忙给分析一下，谢谢！~

vcdog

昨天把squid-graph装上，从页面监控流量显示cache_hit的命中率，好象比昨天要高一些，基本在30%左右！！

vcdog

找到cach_hit命中率低的原因了：我的squid.conf配置文件中，cache_mem 64 MB，这个值设置的太低，网上建议应该设置为内存的1/3大小，之后，将其改为cache_mem 600 MB后，用命令： squidclient -h host-squid-01 -p 3128 mgr:info结果如下：

Median Service Times (seconds)  5 min    60 min:
        HTTP Requests (All):   0.12783  0.13498
        Cache Misses:          0.24524  0.30459
        Cache Hits:            0.00865  0.00562  //cach_hit命中率86.5%
        Near Hits:             0.17711  0.18699
        Not-Modified Replies:  0.00286  0.00286
        DNS Lookups:           0.04237  0.04639
        ICP Queries:           0.00000  0.00000

qianlei

我是跟你一定的问题，我的代理跟你一样，是为内网提供服务的。但是还是出现你一样问题，我的本身已经是512MB了，是什么原因呢

mengcun123

所谓命中率低是不是，和丢包一样的情况？？？？