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Squid Proxy WARNING! Your cache is running out of filedescriptors error and solution
25.04.2013
22:00
Раздел: root - Linux - Squid

 

Squid Proxy WARNING! Your cache is running out of filedescriptors error and solution

 

 

Squid Proxy WARNING! Your cache is running out of filedescriptors error and solution

 

by Vivek Gite on June 16, 2008 · 6 comments· last updated at June 18, 2009

 

 

I

've Squid Proxy server with over 100 Windows workstation. I see following error message in my cache.log file:

 

WARNING! Your cache is running out of filedescriptors

 

Do I need to filter proxy server requests to avoid this problem? How do I fix this problem under CentOS / Fedora / RHEL / Debian Linux?

 

If you see this message in your /var/log/squid/cache.log file, it means Squid proxy server is running out of file descriptors and cannot handle the extra requests sent by your client computers.

Task: Find out current file descriptors limits

 

Login to your Squid proxy server and type the following command at shell prompt:

# squidclient mgr:info | grep 'file descri'

# squidclient -p {port} -u {proxy-user} -w '{proxy-password}' mgr:info | grep 'file descri'

# squidclient -p 8080 -u admin -w 'secretePassword' mgr:info | grep 'file descri'

 

Sample output:

Maximum number of file descriptors: 1024

Available number of file descriptors: 1008

Reserved number of file descriptors: 100

Squid increase the maximum file descriptors

 

First, update /etc/security/limits.conf file:

# vi /etc/security/limits.conf

 

Append following line to increase current limit from 1024 to 4096:

* - nofile 4096

 

Save and close the file. You must re-login to check new limits:

# ulimit -a | grep 'open files'

Sample output:

open files (-n) 4096

 

Next you need to set the maximum number of open file descriptors by modifying squid proxy server configuration as per your Linux distribution.

Set max_filedesc under RHEL / Red Hat / CentOS / Fedora Linux

 

 

Stop the Squid as changes of this value isn't respected by reconfigure command. This value should be changed only if there isn't any active squid process.

# service squid stop

 

Open /etc/squid/squid.conf file

# vi /etc/squid/squid.conf

 

Append / add / modify max_filedesc directive:

max_filedesc 4096

 

Save and close the file. Start the squid proxy server:

# service squid start

 

Now again run squidclient command or check log files for messages:

# squidclient mgr:info

Set max_filedesc under Ubuntu / Debian Linux

 

 

First, stop squid proxy server, enter:

# /etc/init.d/squid stop

 

OR

$ sudo /etc/init.d/squid stop

 

Open /etc/default/squid to set max. number of filedescriptors to use. You can increase this on a busy

cache to a maximum of (currently) 4096 filedescriptors. Default is 1024.

$ sudo vi /etc/default/squid

 

OR

# vi /etc/default/squid

 

Now set SQUID_MAXFD:

SQUID_MAXFD=4096

 

Save and close the file. Start the squid proxy server:

$ sudo /etc/init.d/squid start

 

Verify that it is working with new limits:

# squidclient mgr:info | grep 'file descri'

Так же в этом разделе:
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