Eliezer, you are absolutely right. I got in a hurry and forgot the basics such
as version numbers and all the other details.
The version currently on our squid server is: squid-3.5.27-1.el6.x86_64.rpm
We are running AWS Linux: Amazon Linux AMI 2018.03.0
We are a health care company. We are using squid proxy to control what the
servers in an account can connect to on the internet. AWS looked at an issue
we had with code deploy and they said connections were timing out because the
default connection timeout is 1 min, and suggested we change the timeout to 5
min. It issue has to do with Codedeploy. Since AWS services are on the
internet, I was thinking if we could set an overall timeout, and then one for
services that are known to take more time, I thought it would be a way keep the
length of the timeout down for most things and free up resources for the
majority of tasks.
My concern, as stated below is that connections will take a while to timeout
and it will put more pressure on the number of file descriptors we use. We ran
into an issue with the number of file descriptors used, but figured it out and
we are fine, but increasing the timeout to 5 min set off a warning flag in my
mind, not having a lot of experience with squid. I am not even sure it is an
issue, but I thought I try to make sure before we ran into production issues.
The reason for including the link, is that it was the first one I found and in
the description they mentioned the ability to set timeouts on a
site/domain-specific basis, but in the info that followed and in subsequent
searches, I did not see how it was done, so the failure to find information on
the subject led me to join the list.
In looking at the docs, there are a number of other timeouts, so I obviously
have some homework to do.
Thanks for the quick response.
On 6/4/18, 12:31 PM, "Eliezer Croitoru" <elie...@ngtech.co.il> wrote:
Hey Edward,
First congrats!.
I hope we can help you to figure out the relevant details.
I am not sure why you have spoken to AWS teams about Squid-Cache, may I ask
what OS are you using in AWS?
Also what version of Squid are you using?
The timeout settings are "critical" indeed but depends on what you are
using and doing with Squid-Cache.
Despite to the fact that
https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.visolve.com%2Fsquid%2Fsquid30%2Ftimeout&data=02%7C01%7CEdward.Cheadle%40cambiahealth.com%7C8be888b30a484f0d8b4f08d5ca49570f%7Ce964274919d44f7fb4df802b2b75a809%7C0%7C0%7C636637338708424102&sdata=SpOxewYBxY1Y7qeK7fk5cEF0pWN2l%2B4UOM6IclHVrbw%3D&reserved=0
Is in a way still a lead it's not "up-to-date"
Please note that without understanding what issues have you been facing and
the purpose of the Squid-Cache instance(s?) there is no way to even guess what
might fit your needs.
Eliezer
----
https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fngtech.co.il%2Flmgtfy%2F&data=02%7C01%7CEdward.Cheadle%40cambiahealth.com%7C8be888b30a484f0d8b4f08d5ca49570f%7Ce964274919d44f7fb4df802b2b75a809%7C0%7C0%7C636637338708424102&sdata=Mpu0Ottn255qQxnsXGT%2F%2ByR432Yz9%2FckeKTuVpZ6aUM%3D&reserved=0
Linux System Administrator
Mobile: +972-5-28704261
Email: elie...@ngtech.co.il
From: squid-users <squid-users-boun...@lists.squid-cache.org> On Behalf Of
Cheadle, Edward
Sent: Monday, June 4, 2018 21:06
To: squid-users@lists.squid-cache.org
Subject: [squid-users] Connection Timeouts
We had a person leave and I got selected to update and maintain our squid
proxy. We are talking to AWS and they told us that we needed to change the
connection_timeout value from the default to 5 min.
We have people stress testing out installation and I was concerned that if
connection timeouts are too long we may see congestion.
Should I be worried that connection timeouts will use up file descriptors
at a higher rate?
And what might be the options?
Doing and internet search I found a web page at
https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.visolve.com%2Fsquid%2Fsquid30%2Ftimeout.php&data=02%7C01%7CEdward.Cheadle%40cambiahealth.com%7C8be888b30a484f0d8b4f08d5ca49570f%7Ce964274919d44f7fb4df802b2b75a809%7C0%7C0%7C636637338708424102&sdata=FSq%2FnnFycwsbQaw8xRMzHkBWFY4Iw5F8KeJtdd1hRyc%3D&reserved=0
and in the TIMEOUT description I read
“TIMEOUT
Timeout parameters in Squid can be based on overall connection timeouts,
peer-specific timeouts, site/domain-specific timeouts, request-specific
timeouts etc. Proper setting of timeout values is critical to optimal Squid
performance. Relevant parameters for timeout settings are listed”
Is it possible to narrow the connection timeout to a specific site? I
looked at the website information, squid documentation and did an internet
search.
I did not see anything that narrowed the timeout to a specific timeout.
I am trying to set connection timeouts to AWS sites, but keep connection
timeouts to the default, because it is working well.
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