Re: [squid-users] Squid Processes

On 27.02.2012 00:20, Ben wrote:
>> On 26/02/2012 6:59 a.m., Ben wrote:
>>> Hi Amos,
<snip>
>>>
>>> As i tested single squid instance with 400-450 req / sec and it is
>>> performing fine.Currently i deployed squid with 175 Mbps bandwidth
>>> load.Now we plan to use it for 400 Mbps so it suppose be 800 or 900
>>> http req / sec , Does single squid process handle such heavy load or
>>> ?
>>
>> The fact you got past 50Mbps easily at ~400 req/sec tells me your
>> traffiic might be a bit unusual. On the ISP scenario I'm used to
>> estimating with most of the reports have needed two Squid to get over
>> 100Mbps. Good news for you, bad news for forcasting the limits.
>>
> You mean two instances of squid on same h/w to handle 100 Mbps.?

Maybe. Squid will consume 100% of _a_ CPU core or 100% of RAM available
to it before trouble hits. To get multiple instances working well on one
box you need more than 2 CPU cores and enough RAM to spread between
them.

With the numbers below you will need 2-3 Squid instances. Whether the
box can run that many Squid at peak traffic is the question...

> As
> in production i m using squid with 175 Mbps bandwidth usage and 450
> http req / sec.
> And it seems fine.Yes sometimes my cpu consumption is ~ 95 % and
> memory is 85 % but generally cpu consumption is ~40 % and memory is ~
> 70 %.

Okay. I that case I would say your squid can go higher but only a few
req/sec. Squid will just keep consuming more CPU and RAM until one
reaches 100%, after which it slows down, possibly a lot.

>
> As now i tested with single disk( 10k rpm). But now i plan to upgrade
> it with more hdd.

That 10krpm may be maxing out and why your squid is not reaching either
100% CPU or RAM. More disks should help, 15k would be better.

Amos
Received on Sun Feb 26 2012 - 22:16:18 MST