Mark Kirkwood disse na ultima mensagem: > 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). >
I forgot to say that I tried it already. Even if it gave me no improvement I have it in 16 at this time together with a higher vfs.ufs.dirhash_maxmem value. Sincerley, any of the configuration changes I did gave me absolutely nothing in relationship to the disk read access performance. That is disappointing. Should I go back and try ufs1 perhaps? Or is it that squid does not work well on 6.2? I use diskd but in order to check if there is a SHM issue I tried ufs and aufs, but also no difference at all. On 6.2 I do not even get close to 50% of 4.11 disk read performance. thank you Michel computador é como nem cavalo e mulher mais que montam neles, pior que ficam ... **************************************************** Datacenter Matik http://datacenter.matik.com.br E-Mail e Data Hosting Service para Profissionais. **************************************************** _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
