Re: [squid-users] Squid and OS tuning

Kevin;

Many thanks. My compile differs from yours somewhat, I am compiling like
this:

configure --prefix=/squid
--enable-storeio=diskd,ufs
--enable-icmp
--enable-snmp
--enable-err-languages=English
--enable-default-err-language=English
--disable-hostname-checks --enable-underscores --enable-stacktrace

> configure --enable-async-io
What benefit does enabling this do?

>--enable-cache-digests
>--enable-pthreads

What does this do?

>--enable-storeio=ufs,aufs
>--enable-removal-policies=lru,heap

I am using in my squid.conf:

cache_replacement_policy heap LFUDA

What is the benefit here versus what I am doing?

Many thanks again,

.vp

>From: "K K" <kkadow@gmail.com>

>On 4/4/07, Vadim Pushkin <wiskbroom@hotmail.com> wrote:
>>Does anyone have any OS tips for Sparc/Solaris? (preferably 8).
>
>Sell the Sparc, buy two Sun-badged AMD64 machines to run FreeBSD on?
>
>
>Until recently I ran a number of large caches on Solaris 8/Sparc,
>serving as parent caches for child caches used by thousands of
>clients. Here's my settings:
>
>First thing, ignore the tuning suggestions for SunOS 2.6, few 2.6
>options apply to Solaris 8, and even fewer to Solaris 10 (Speaking of
>which, if your hardware supports 10, upgrading may give performance
>improvements).
>
>configure --enable-async-io --enable-cache-digests
>--enable-underscores --enable-pthreads --enable-storeio=ufs,aufs
>--enable-removal-policies=lru,heap
>
>First, I disable 'nscd' in Solaris startup, instead I actually ran a
>local 'dnscache' resolver on each box, so squid.conf had
>"dns_nameservers 127.0.0.1", and also set fqdncache_size relatively
>high.
>
>In the squid startup script, use 'ndd' to force network parameters:
> /usr/sbin/ndd -set /dev/tcp tcp_ip_abort_cinterval 29000
> /usr/sbin/ndd -set /dev/tcp tcp_time_wait_interval 45000
> /usr/sbin/ndd -set /dev/tcp tcp_xmit_hiwat 32767
> /usr/sbin/ndd -set /dev/tcp tcp_recv_hiwat 32767
> /usr/sbin/ndd -set /dev/udp udp_xmit_hiwat 16384
> /usr/sbin/ndd -set /dev/udp udp_recv_hiwat 16384
> /usr/sbin/ndd -set /dev/tcp tcp_smallest_anon_port 32772
>
>The cache_dir is 'aufs', on a drive dedicated to the squid cache, and
>formatted specially for squid, with the fragsize set equal to the
>blocksize.
>
>While counter intuitive, it seems to help performance if you set
>cache_mem and maximum_object_size_in_memory both to relatively low
>values (a good start would be 30% of total RAM, and 64K,
>respectively), and trust the Solaris memory management to keep popular
>objects in memory.
>
>Lastly, I rebuilt squid using the custom logging patch, and disabled
>local cache_access and cache_store logging, instead sending access
>events to a remote loghost via syslog. This made it easier to do
>central accounting for a pool of caches, and also gave a small
>performance gain, as there is less overhead in emitting a UDP packet
>than in writing to disk.
>
>Kevin "Not kidding about selling the Sparc" Kadow
Received on Wed Apr 04 2007 - 15:28:43 MDT