[squid-users] poor performance

Hi!

Today i'm running squid 2.5stable9 in a debian sarg box SUN v20z. All
works very nice. Although, i need to migrate squid to a new server SUN
x4100 running FreeBSD. And now begin my problems.
I was talking about my performance problems with freebsd mailing list.
But we can't find a solution for my problem described below:

First of all, i'll paste some informations about my new server.

#uname -a
FreeBSD sd.xyz.com.br 6.2-STABLE FreeBSD 6.2-STABLE #0: Wed Aug 29
10:26:18 BRT 2007
root@sd.xyz.com.br:/usr/src/sys/amd64/compile/LGB amd64

#mount
/dev/da0s1a on / (ufs, local)
devfs on /dev (devfs, local)
/dev/da0s1e on /tmp (ufs, local, soft-updates)
/dev/da0s1f on /usr (ufs, local, soft-updates)
/dev/da0s1d on /var (ufs, local, soft-updates)
/dev/da0s2a on /cache (ufs, local, soft-updates)
devfs on /var/chroot/named/dev (devfs, local)

#df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/da0s1a 496M 88M 368M 19% /
devfs 1.0K 1.0K 0B 100% /dev
/dev/da0s1e 496M 538K 456M 0% /tmp
/dev/da0s1f 9.4G 4.5G 4.1G 52% /usr
/dev/da0s1d 4.7G 1.5G 2.9G 34% /var
/dev/da0s2a 9.4G 89M 8.6G 1% /cache
devfs 1.0K 1.0K 0B 100% /var/chroot/named/dev

My kernel was compiled in the day before yesterday with some tunning options:

Commented:
options INET6 # IPv6

- included:
options SYSVSHM #SYSV-style shared memory
options SYSVMSG #SYSV-style message queues
options SYSVSEM #SYSV-style semaphores
options SMP # Symmetric

options HZ=2000
options DEVICE_POLLING # Soft intrrupt's
options VFS_AIO
options MAXDSIZ=(4096UL*1024*1024) # Conf para 4Gb
options MAXSSIZ=(256UL*1024*1024) # E aqui vai pra 128
options DFLDSIZ=(4096UL*1024*1024) # 4096 tb!

 # Message Queues [Based on Squid FAQ]

option MSGMNB=262144 # Number of bytes in a queue
option MSGMNI=128 # Need to be at least 2 times the number of
cache_dir entries in the squid
option MSGSSZ=256 # Size of the message segment in a queue
option MSGTQL=16384 # Number of max queue identifiers versus 128
option MSGSEG=2048 # Number of messages segments

# Shared Memory [Based on Squid FAQ]
options SHMMNI=256 # The half of the message queues at least [1 for
each cache_dir]
options SHMALL=65536 #
options SHMMAX=(128UL*1024*1024) #
options SHMSEG=128

In squid.conf file :

cache_dir diskd /usr/local/squid/cache/cache1 5120 16 256 Q1=128 Q2=100
cache_dir diskd /usr/local/squid/cache/cache2 5120 16 256 Q1=128 Q2=100

cache_replacement_policy heap LFUDA

memory_replacement_policy heap GDSF

cache_mem 1536 MB

cache_swap_low 65
cache_swap_high 80

maximum_object_size 64 MB
minimum_object_size 0 KB
maximum_object_size_in_memory 2560 Kb

#squid -v
Squid Cache: Version 2.6.STABLE14
configure options: '--bindir=/usr/local/sbin'
'--sbindir=/usr/local/sbin' '--datadir=/usr/local/etc/squid'
'--libexecdir=/usr/local/libexec/squid'
'--localstatedir=/usr/local/squid' '--sysconfdir=/usr/local/etc/squid'
'--enable-removal-policies=lru heap' '--disable-linux-netfilter'
'--disable-linux-tproxy' '--disable-epoll' '--enable-auth=basic ntlm
digest' '--enable-basic-auth-helpers=DB NCSA PAM MSNT SMB YP'
'--enable-digest-auth-helpers=password'
'--enable-external-acl-helpers=ip_user session unix_group
wbinfo_group' '--enable-ntlm-auth-helpers=SMB'
'--enable-negotiate-auth-helpers=squid_kerb_auth' '--with-pthreads'
'--enable-storeio=ufs diskd null aufs' '--enable-delay-pools'
'--enable-snmp' '--disable-carp' '--enable-ssl' '--with-openssl=/usr'
'--enable-cache-digests' '--enable-arp-acl'
'--enable-follow-x-forwarded-for' '--with-large-files'
'--enable-large-cache-files' '--enable-err-languages=Azerbaijani
Bulgarian Catalan Czech Danish Dutch English Estonian Finnish French
German Greek Hebrew Hungarian Italian Japanese Korean Lithuanian
Polish Portuguese Romanian Russian-1251 Russian-koi8-r Serbian
Simplify_Chinese Slovak Spanish Swedish Traditional_Chinese Turkish'
'--enable-default-err-language=English' '--enable-ntlm-fail-open'
'--prefix=/usr/local' '--mandir=/usr/local/man'
'--infodir=/usr/local/info/' 'amd64-portbld-freebsd6.2' 'CC=cc'
'CFLAGS=-O2 -fno-strict-aliasing -pipe -I/usr/include' 'CPPFLAGS='
'LDFLAGS= -rpath=/usr/lib:/usr/local/lib -L/usr/lib'
'build_alias=amd64-portbld-freebsd6.2'
'host_alias=amd64-portbld-freebsd6.2'
'target_alias=amd64-portbld-freebsd6.2'

My new box is a X4100 SUN.
With 4 gigabits NIC.
Two SAS disks.
4Gb RAM

I tryed use with and without RAID but I got the same problem.

Let me explain my environment:
All my users use IE6 and they have proxy config like this:
host: proxy.xyz.com.br
port 3128

Once i need to migrate all users to my new server with FreeBSD ,I only
change the IP address of proxy register in DNS server.
Ok. After two minutes i can see some users in the new server log(access.log).

After 10 minutes squidclient mgr:info return me 70 clients and the
speed connection goes very low for the users.

I commented out all acl's and authentication scheme in squid conf
file. Running squid i'm monitoring with systat -v and iostat but CPU
and disks is working almost all time as idle.

cache.log doesn't show me errors. only this messages:
2007/08/30 08:13:31| httpAccept: FD 39: accept failure: (53) Software
caused connection abort
2007/08/30 08:13:32| httpAccept: FD 39: accept failure: (53) Software
caused connection abort
2007/08/30 08:13:32| httpAccept: FD 39: accept failure: (53) Software
caused connection abort
2007/08/30 08:13:32| httpAccept: FD 39: accept failure: (53) Software
caused connection abort
2007/08/30 08:13:32| httpAccept: FD 39: accept failure: (53) Software
caused connection abort
2007/08/30 08:13:32| httpAccept: FD 39: accept failure: (53) Software
caused connection abort
2007/08/30 08:13:32| httpAccept: FD 39: accept failure: (53) Software
caused connection abort
2007/08/30 08:13:32| httpAccept: FD 39: accept failure: (53) Software
caused connection abort
2007/08/30 08:13:32| httpAccept: FD 39: accept failure: (53) Software
caused connection abort
2007/08/30 08:13:50| httpAccept: FD 39: accept failure: (53) Software
caused connection abort

I've read that is harmless.

But the low speed continue.
This is not a DNS problem. I've tested.

Any suggestion?!?!

tanx

-- 
Att.
Lutieri G. B.