RE: [squid-users] CPU utilization performance issue

Hi Nooshin,

from what I've read, aufs are more suitable for linux
while diskd are more for the other OSes.

BTW I also have some lower spec machines(DELL 2450
dual pro 1GHz, 1G RAM) running their
caching(squid2.4-stable7) disks on ext3 and their CPU
utilization are only about 30% on 100 req/s in another
caching env...

--
Wolf

--- "Zand, Nooshin" <nooshin.zand@intel.com> wrote: >
Hi,
> I am just wonder why you are not using diskd.
> Based on Benchmarking that I read, diskd provides
> faster I/O performance.
> I am planning to run squid on Linux Redhat 9.0 and
> thinking to use ext3 and diskd.
> Thanks,
> Nooshin
>
> -----Original Message-----
> From: Tay Teck Wee [mailto:wolfpacks01@yahoo.com.sg]
> Sent: Friday, August 08, 2003 2:22 AM
> To: squid-users
> Subject: Re: [squid-users] CPU utilization
> performance issue
>
>
> Hi everyone,
>
> thanks for the input. The ACL list have since been
> slightly altered, using only src(22 entries),
> dstdomain(114 entries) and url_regex(20 entries). I
> am
> currently on kernel 2.4.20-19.9 so the
> Hyperthreading
> might hv been optimized.
>
> Now the machine is handling about 110 req/s but
> again
> the CPU will climb to abt 90-95%. Is it possible for
> my squid box to go beyond 180 req/s, which is the
> peak
> for each proxies in the existing pool(ISP env)? I am
> trying to replace my existing NetCaches with
> squids...one box for one box.
>
> I am wondering if its because reiserfs will consume
> more CPU than other fs like ext3? Will changing my
> cache partitions to reiserf lower down the CPU
> usage?
> Or can anyone suggest other possible improvements?
> Thanks.
>
> my 3 caching partitions are on 3 separate disks:-
> /dev/sdb1 /cdata1 reiserfs notail,noatime 1 2
> /dev/sdc1 /cdata2 reiserfs notail,noatime 1 2
> /dev/sdd1 /cdata3 reiserfs notail,noatime 1 2
>
> --
> Wolf
>
> --- Tay Teck Wee <wolfpacks01@yahoo.com.sg> wrote:
> >
> Hi,
> >
> > when I'm getting about 90 req/s or 800 concurrent
> > connection(according to my foundry L4) to my
> > squid(RedHat 8.0/2.5 Stable3 w deny_info patch),
> the
> > CPU utilization avg abt 80%. How do I lower the
> CPU
> > utilization of my squid? Thanks.
> >
> > Below is my machine specs:-
> >
> > Intel Xeon single-processor 2.4GHz(DELL 2650)
> > 2G physical RAM(w 2G swap under linux)
> > 2X 33G for everything except caching (mirror)
> > 3X 33G for caching (volume)
> >
> > /dev/sda7 505605 68437 411064
>
> > 15% /
> > /dev/sda1 124427 9454 108549
>
> > 9% /boot
> > /dev/sdb1 35542688 201248 35341440
>
> > 1% /cdata1
> > /dev/sdc1 35542688 200888 35341800
>
> > 1% /cdata2
> > /dev/sdd1 35542688 200940 35341748
>
> > 1% /cdata3
> > /dev/sda3 1035692 49796 933284
>
> > 6% /home
> > none 1032588 0 1032588
>
> > 0% /dev/shm
> > /dev/sda5 1035660 691648 291404
>
> > 71% /usr
> > /dev/sda6 505605 76236 403265
>
> > 16% /usr/local
> > /dev/sda8 29695892 83456 28103936
>
> > 1% /var
> >
> > Below is my squid.conf(only the essential).
> >
> > For ACL, basically I hv 3 acl list(in 3 separate
> > files), one containing allowable IPs while the
> other
> > contains deny IPs. I also hv 3 list of banned
> sites
> > list(in 3 separate files).:-
> >
> > http_port 8080
> > acl QUERY urlpath_regex cgi-bin \?
> > no_cache deny QUERY
> > cache_mem 400 MB
> > cache_swap_low 92
> > cache_swap_high 95
> > maximum_object_size 2 MB
> > maximum_object_size_in_memory 100 KB
> > cache_replacement_policy heap GDSF
> > memory_replacement_policy heap GDSF
> > cache_dir aufs /cdata1 16000 36 256
> > cache_dir aufs /cdata2 16000 36 256
> > cache_dir aufs /cdata3 16000 36 256
> > cache_access_log
> /var/log/cachelog/cache.access.log
> > cache_log /var/log/cachelog/cache.log
> > cache_store_log none
> > quick_abort_min -1 KB
> > acl all src 0.0.0.0/0.0.0.0
> > acl manager proto cache_object
> > acl localhost src 127.0.0.1/255.255.255.255
> > #3 banned list files
> > acl SBA dstdomain "/usr/local/squid/etc/SBA.txt"
> > acl CNB dstdomain "/usr/local/squid/etc/CNB.txt"
> > acl CNB2 url_regex "/usr/local/squid/etc/CNB2.txt"
> > #3 access list files
> > acl NetTP src "/usr/local/squid/etc/NetTPsrc.acl"
> > acl NetDeny src "/usr/local/squid/etc/deny.acl"
> > acl NetAllow src "/usr/local/squid/etc/allow.acl"
> > http_access deny SBA
> > http_access deny CNB
> > http_access deny CNB2
> > http_access deny NetDeny
> > http_access allow NetAllow
> > http_access allow NetTP
> > http_access deny all
> > http_reply_access allow all
> > cache_effective_user squid
> > cache_effective_group squid
> > logfile_rotate 10
> > deny_info ERR_SBA_DENIED SBA
> > deny_info ERR_CNB_DENIED CNB CNB2
> > memory_pools off
> > coredump_dir /var/log/cachelog
> >
> > Thanks again!
> >
> > Regards,
> > Wolf
> >
> >
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