On 24/07/2012 7:21 p.m., Alamgir Shamim wrote:
Hello,
We are using squid version squid-2.6.STABLE21-6.el5. But getting very
poor performance.
Our total Internet user are almost 750. At a time 500 to 600 user
browse internet.
all of them are getting slow response. it takes 10 to 30 second to load a page.
Here I am giving you some out put.
top out put...
=========
top - 12:54:09 up 31 days, 5:59, 2 users, load average: 0.18, 0.24, 0.24
Tasks: 80 total, 1 running, 79 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.5%us, 0.2%sy, 0.0%ni, 93.5%id, 4.2%wa, 0.0%hi, 0.6%si, 0.0%st
Mem: 2075016k total, 2020432k used, 54584k free, 233784k buffers
Swap: 2031608k total, 96k used, 2031512k free, 1538140k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
12866 squid 15 0 100m 70m 2508 S 3 3.5 4:56.96 squid
6815 root 18 0 10936 4280 428 S 0 0.2 0:00.00 squid
free -m output
============
[root@proxy253 squid]# free -m
total used free shared buffers cached
Mem: 2026 1973 53 0 228 1502
-/+ buffers/cache: 242 1783
Swap: 1983 0 1983
Processor infor
==============
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.20GHz
stepping : 3
cpu MHz : 3200.343
cache size : 2048 KB
physical id : 0
siblings : 2
------------------------
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.20GHz
stepping : 3
cpu MHz : 3200.343
cache size : 2048 KB
physical id : 0
siblings : 2
-------------------------
Could you please let me know what might be the reason for getting slow
performance. We have 14 mbps of Internet bandwidth.
We are doing some content filtering also with squid.
There are several possible reasons:
* you have configured squid in a inefficient way
- I'm happy to do free performance audits here if you want to paste
your squid.conf to the list (obscure the cachemgr_passwd detail though
please)
* you are content filtering
- this is a major slowdown for Squid no matter what type of filtering
is being done
* overloaded or slow disks I/O speeds on disk cache
- only relevant if you are disk caching
* 2.6 will be adding to the slowdown
- 2.7 series had a performance focus on development and is a good 20%
faster just in the code.
- 2.6 has low HTTP/1.1 compliance, meaning you loose out on many
HTTP/1.1 performance features available in later releases.
Amos
