[squid-users] squid-users Digest, Vol 26, Issue 82
Yuri Voinov
yvoinov at gmail.com
Sun Oct 23 13:26:54 UTC 2016
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You can have slow DNS. Consider to use local caching DNS recursor as
source for proxy & users.
23.10.2016 18:42, Krishna Kulkarni пишет:
>
> Hi Antony,
> Thanks for the reply. I have made changes in squid.conf as per your
suggestion and have allocated 20 GB of Hard disk space.
> Squid server at my location handles http/https requests for more than
500 hosts. But at peak hours squid usually performs very slow and
browser takes 1-2 minutes just to serve google home page and more time
than that for heavy web page.
> I have verified network link utilization & found it consumes not more
than 15 mb whereas link bandwidth is of 45mb but still squid serves web
pages very slow to client hosts.
> Any suggestions in squid configuration to overcome this issue would be
highly appreciated.
>
> Thanks,
> Krishna.
>
> On Oct 23, 2016 5:11 PM, <squid-users-request at lists.squid-cache.org
<mailto:squid-users-request at lists.squid-cache.org>> wrote:
>
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>
> Today's Topics:
>
> 1. Slowness in Squid (Krishna Kulkarni)
> 2. Re: Slowness in Squid (Antony Stone)
> 3. external_acl_type problem (reinerotto)
> 4. Re: Slowness in Squid (Yuri Voinov)
> 5. Re: Slowness in Squid (Matus UHLAR - fantomas)
> 6. Re: Slowness in Squid (Yuri Voinov)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 23 Oct 2016 09:06:22 +0530
> From: Krishna Kulkarni <krishna26kulkarni at gmail.com
<mailto:krishna26kulkarni at gmail.com>>
> To: squid-users at lists.squid-cache.org
<mailto:squid-users at lists.squid-cache.org>
> Subject: [squid-users] Slowness in Squid
> Message-ID:
>
<CAN-hqth-kdQDYXTR=jDnbVoiNmEMpi71+Sx7waO=61s0keucDQ at mail.gmail.com
<mailto:61s0keucDQ at mail.gmail.com>>
> Content-Type: text/plain; charset="utf-8"
>
> Dear Team
> I am new to squid.. I have installed squid 3.5 on CentOS 6.7. As a
> configuration part, I have kept most of the things default. Please
advice
> on how to allocate cache memory of 20 GB to squid. I got to know
that, more
> cache memory would increase performance of squid..
>
> Thanks,
> Krishna
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> ------------------------------
>
> Message: 2
> Date: Sun, 23 Oct 2016 10:16:28 +0200
> From: Antony Stone <Antony.Stone at squid.open.source.it
<mailto:Antony.Stone at squid.open.source.it>>
> To: squid-users at lists.squid-cache.org
<mailto:squid-users at lists.squid-cache.org>
> Subject: Re: [squid-users] Slowness in Squid
> Message-ID: <201610231016.28867.Antony.Stone at squid.open.source.it
<mailto:201610231016.28867.Antony.Stone at squid.open.source.it>>
> Content-Type: Text/Plain; charset="iso-8859-15"
>
> On Sunday 23 October 2016 at 05:36:22, Krishna Kulkarni wrote:
>
> > I am new to squid.. I have installed squid 3.5 on CentOS 6.7. As a
> > configuration part, I have kept most of the things default.
Please advice
> > on how to allocate cache memory of 20 GB to squid.
>
> Do you mean cache memory, or disk cache?
>
>
> If you mean memory (RAM) and you have enough of this in your
system (eg: 32
> Gbytes or more), then find the section in squid.conf which starts
with:
>
> # MEMORY CACHE OPTIONS
>
> And read about the tag "cache_mem".
>
> To set this value (normally 256 Mbytes) to 20 Gbytes, set:
>
> cache_mem 20 GB
>
>
> If, on the other hand, you do not mean memory, but you mean disk
cache, then
> find the section in squid.conf with starts with:
>
> # TAG: cache_dir
>
> and read that section.
>
> Pay particular attention to the line which says:
>
> # cache_dir ufs Directory-Name Mbytes L1 L2 [options]
>
> And then later there is an example:
>
> # cache_dir ufs /var/spool/squid3 100 16 256
>
> Uncomment that line and change the 100 (Megabytes) in that line to
20000 (for
> 20 Gigabytes) and perhaps also adjust the 16 to something like 64
or even 256
> - for a large cache you don't want a few directories with lots of
entries
> each, so it's worthwhile creating lots of directories to keep the
number of
> files in each down.
>
> > I got to know that, more cache memory would increase performance
of squid..
>
> What do you mean by "performance"?
>
>
> Antony.
>
> --
> Just when you think you're done, a cat floats by with buttered
toast strapped
> to its back.
>
> - Steve Krug, "Don't make me think"
>
> Please reply to
the list;
> please
*don't* CC me.
>
>
> ------------------------------
>
> Message: 3
> Date: Sun, 23 Oct 2016 03:39:31 -0700 (PDT)
> From: reinerotto <augustus_meyer at gmx.net
<mailto:augustus_meyer at gmx.net>>
> To: squid-users at lists.squid-cache.org
<mailto:squid-users at lists.squid-cache.org>
> Subject: [squid-users] external_acl_type problem
> Message-ID: <1477219171447-4680203.post at n4.nabble.com
<mailto:1477219171447-4680203.post at n4.nabble.com>>
> Content-Type: text/plain; charset=us-ascii
>
> 1)
> According to
> http://www.squid-cache.org/Doc/config/external_acl_type/
<http://www.squid-cache.org/Doc/config/external_acl_type/>
>
> in squid.conf, this
>
> external_acl_type check_delay ttl=0 cache=0 %SRC
/etc/squid/check_delay.sh
>
> should start 0 helpers immediately after squid (3.5.22) start-up.
> However, I always see 5.
>
> 2)
> I often see this:
> Sat Oct 22 23:51:18 2016 user.alert syslog: The check_delay
helpers are
> crashing too rapidly, need help!
> Sat Oct 22 23:51:18 2016 local4.notice squid[21677]: Squid Parent:
(squid-1)
> process 27685 exited with status 1
>
> Still trying to trace down the problem, I notice, that in this
case some
> helpers still kept alive, although
> I expect them to be killed, too, in case squid-1 exits.
>
>
> I need to add, that I am running squid on an embedded system,
cross-compiled
> for MIPS.
> So there _might_ be some assumptions made for "standard LINUX"
squid, which
> are not true in my case.
>
>
>
>
> --
> View this message in context:
http://squid-web-proxy-cache.1019090.n4.nabble.com/external-acl-type-problem-tp4680203.html
<http://squid-web-proxy-cache.1019090.n4.nabble.com/external-acl-type-problem-tp4680203.html>
> Sent from the Squid - Users mailing list archive at Nabble.com.
>
>
> ------------------------------
>
> Message: 4
> Date: Sun, 23 Oct 2016 17:15:53 +0600
> From: Yuri Voinov <yvoinov at gmail.com <mailto:yvoinov at gmail.com>>
> To: squid-users at lists.squid-cache.org
<mailto:squid-users at lists.squid-cache.org>
> Subject: Re: [squid-users] Slowness in Squid
> Message-ID: <ebf2c080-b508-9547-a9df-d7971df609a4 at gmail.com
<mailto:ebf2c080-b508-9547-a9df-d7971df609a4 at gmail.com>>
> Content-Type: text/plain; charset="utf-8"
>
>
> Keep in mind - a huge in-memory cache does not always give the
> acceleration. Moreover, in most cases you can get the opposite effect
> expected. It is a common misconception - that the giant memory cache
> will give a giant performance gain.
>
>
> 23.10.2016 9:36, Krishna Kulkarni пишет:
>
> > Dear Team
> > I am new to squid.. I have installed squid 3.5 on CentOS 6.7. As a
> configuration part, I have kept most of the things default. Please
> advice on how to allocate cache memory of 20 GB to squid. I got to know
> that, more cache memory would increase performance of squid..
>
> > Thanks,
> > Krishna
>
>
>
> > _______________________________________________
> > squid-users mailing list
> > squid-users at lists.squid-cache.org
<mailto:squid-users at lists.squid-cache.org>
> > http://lists.squid-cache.org/listinfo/squid-users
<http://lists.squid-cache.org/listinfo/squid-users>
>
>
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> ------------------------------
>
> Message: 5
> Date: Sun, 23 Oct 2016 13:37:04 +0200
> From: Matus UHLAR - fantomas <uhlar at fantomas.sk
<mailto:uhlar at fantomas.sk>>
> To: squid-users at lists.squid-cache.org
<mailto:squid-users at lists.squid-cache.org>
> Subject: Re: [squid-users] Slowness in Squid
> Message-ID: <20161023113704.GA12924 at fantomas.sk
<mailto:20161023113704.GA12924 at fantomas.sk>>
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>
> On 23.10.16 17:15, Yuri Voinov wrote:
> >Keep in mind - a huge in-memory cache does not always give the
> >acceleration. Moreover, in most cases you can get the opposite effect
> >expected. It is a common misconception - that the giant memory cache
> >will give a giant performance gain.
>
> doesn't that imply kind of effectiveness?
>
> >23.10.2016 9:36, Krishna Kulkarni пишет:
> >> I am new to squid.. I have installed squid 3.5 on CentOS 6.7. As a
> >configuration part, I have kept most of the things default. Please
> >advice on how to allocate cache memory of 20 GB to squid. I got
to know
> >that, more cache memory would increase performance of squid..
>
> --
> Matus UHLAR - fantomas, uhlar at fantomas.sk
<mailto:uhlar at fantomas.sk> ; http://www.fantomas.sk/
> Warning: I wish NOT to receive e-mail advertising to this address.
> Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
> The only substitute for good manners is fast reflexes.
>
>
> ------------------------------
>
> Message: 6
> Date: Sun, 23 Oct 2016 17:40:46 +0600
> From: Yuri Voinov <yvoinov at gmail.com <mailto:yvoinov at gmail.com>>
> To: squid-users at lists.squid-cache.org
<mailto:squid-users at lists.squid-cache.org>
> Subject: Re: [squid-users] Slowness in Squid
> Message-ID: <790ee9e7-f646-d14a-1213-a3729e30d90f at gmail.com
<mailto:790ee9e7-f646-d14a-1213-a3729e30d90f at gmail.com>>
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>
>
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> This effect is good known to all who have worked with relational
> databases. In fact, it is typical in general for all caches except
> purpose-built highly scalable systems.
>
>
> 23.10.2016 17:37, Matus UHLAR - fantomas пишет:
> > doesn't that imply kind of effectiveness?
>
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> End of squid-users Digest, Vol 26, Issue 82
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