Michel Santos wrote:
I hope somebody can help me. I upgraded recently my cache server (squid)
4.11 to 6.2
I notice that my disk read performance seems to be low. I observe it by
reading diskio from net-snmp. I started to check this because my old
server gave much better results from cache.
I see read access as 1/4 - 1/6 of write access. My cache_dirs are full and
no swap in use. IOLA is not over 25-30 in peaks
is there some special configuration to get better read performance on 6.2?
My disks are UW320 10k on Adaptec 29320 and the same as on the 4.11
server. I really dont care about write speed so much so if there are
parameters to configure I apreciate to hear about.
I checked the following with 1 and 0 but it does not make any difference
at all
vfs.write_behind
vfs.vmiodirenable
I get an average of 6-8Mb/s through this server and 3-4 of it is http
traffic. I see the object are going into the cache but for some reason it
seems they can not be read in time.
I tried different newfs -b and -f and actually 1024/4096 seems to be best.
I do not cache large files on this machine.
Is there something I sgould try?
Note sure this will help you, as your files are all small, but try
increasing vfs.read_max (say 16 or 32).
Cheers
Mark
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