Здравствуйте! Имеется squid 3.1.10 в прозрачном режиме под средней нагрузкой, необходимо оптимизировать время отклика, можно даже ценой byte hit ratio.
вот страничка статистики:
Connection information for squid:
Number of clients accessing cache: 0
Number of HTTP requests received: 54838873
Number of ICP messages received: 0
Number of ICP messages sent: 0
Number of queued ICP replies: 0
Number of HTCP messages received: 0
Number of HTCP messages sent: 0
Request failure ratio: 0.00
Average HTTP requests per minute since start: 3812.6
Average ICP messages per minute since start: 0.0
Select loop called: 163823255 times, 5.268 ms avg
Cache information for squid:
Hits as % of all requests: 5min: 35.4%, 60min: 30.6%
Hits as % of bytes sent: 5min: 13.1%, 60min: 13.6%
Memory hits as % of hit requests: 5min: 10.8%, 60min: 12.5%
Disk hits as % of hit requests: 5min: 56.6%, 60min: 56.3%
Storage Swap size: 205992044 KB
Storage Swap capacity: 83.8% used, 16.2% free
Storage Mem size: 520860 KB
Storage Mem capacity: 99.9% used, 0.1% free
Mean Object Size: 24.07 KB
Requests given to unlinkd: 0
Median Service Times (seconds) 5 min 60 min:
HTTP Requests (All): 0.10857 0.12106
Cache Misses: 0.16775 0.16775
Cache Hits: 0.00865 0.00767
Near Hits: 0.05633 0.15888
Not-Modified Replies: 0.00000 0.00000
DNS Lookups: 0.13638 0.14261
ICP Queries: 0.00000 0.00000
Resource usage for squid:
UP Time: 863019.369 seconds
CPU Time: 102723.939 seconds
CPU Usage: 11.90%
CPU Usage, 5 minute avg: 16.16%
CPU Usage, 60 minute avg: 16.62%
Process Data Segment Size via sbrk(): 1748868 KB
Maximum Resident Size: -1134320 KB
Page faults with physical i/o: 12
Memory usage for squid via mallinfo():
Total space in arena: 1749000 KB
Ordinary blocks: 1697358 KB 2731596 blks
Small blocks: 0 KB 0 blks
Holding blocks: 105080 KB 19 blks
Free Small blocks: 0 KB
Free Ordinary blocks: 51641 KB
Total in use: 1802438 KB 97%
Total free: 51641 KB 3%
Total size: 1854080 KB
Memory accounted for:
Total accounted: 1261297 KB 68%
memPool accounted: 1261297 KB 68%
memPool unaccounted: 592782 KB 32%
memPoolAlloc calls: 13629802631
memPoolFree calls: 13767274231
File descriptor usage for squid:
Maximum number of file descriptors: 131072
Largest file desc currently in use: 4521
Number of file desc currently in use: 2585
Files queued for open: 0
Available number of file descriptors: 128487
Reserved number of file descriptors: 100
Store Disk files open: 4
Internal Data Structures:
8624896 StoreEntries
98650 StoreEntries with MemObjects
98205 Hot Object Cache Items
8556949 on-disk objects
В качестве кэширующего DNS стоит bind 9, использует root-servers. Какие оптимизации на уровне tcp-sockets/conntrack/итд можно сделать? Сейчас все стоит на обрезаной gentoo. Затыков по железу нет - Core i7 950, 6гб памяти, сетевухи серверные intel, винты 2x146gb SAS, reiserfs notail/noatime. Т.е. нужно выжать из железа все, что только можно. Гугл прошерстил вдоль и поперек, но сетевой аспект сквида в инструкциях почти не затрагивается
Сейчас хочу покрутить
/proc/sys/net/ipv4/tcp_tw_recycle
/proc/sys/net/ipv4/tcp_tw_reuse
/proc/sys/net/ipv4/tcp_max_syn_backlog
Но не знаю, стоит ли?
