Solved

Squid performance problems

Posted on 2009-04-09
5
340 Views
Last Modified: 2013-11-08
Running
CentOS 5.2
Squid Version 3.0.STABLE10
Server is a VM with 1 CPU and 2 GB of RAM allocated.

During working hours, the CPU on the server peaks at 100% for a minute or two about once an hour.  When this happens, all web surfing comes to a half.  Using top, squid is the top process.  I cannot tell why it maxes out the CPU several times per day.  Is it flushing to cache?  Any tips on solving this?

Thanks,
Shannon
0
Comment
Question by:shannon_adams
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 

Author Comment

by:shannon_adams
ID: 24107560
I suspected Squid, but I watched it very closely. When it happened again a few minutes ago, I checked the processes using "top". It showed 0% idle and there were 10 or entries for the command "proxy" - all taking over 4% of CPU with one over 40%. After a minute or so, they disappeared and the system was back to normal - 80% or so idle. Can someone shed some light on what might be causing this?
0
 
LVL 79

Accepted Solution

by:
arnold earned 500 total points
ID: 24115309
How much storage did you allocate to the cache store?  It might be that the store cache is being reprocessed.

Check the store.log, access.log to see what it is doing when this happens.
0
 
LVL 62

Expert Comment

by:gheist
ID: 24122460
Can you post output of "uptime" and "free"

Have you tried using accept filter?
Does setting null che on disk and half of memory for mem cache help on issue?
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Why Shell Scripting? Shell scripting is a powerful method of accessing UNIX systems and it is very flexible. Shell scripts are required when we want to execute a sequence of commands in Unix flavored operating systems. “Shell” is the command line i…
Every server (virtual or physical) needs a console: and the console can be provided through hardware directly connected, software for remote connections, local connections, through a KVM, etc. This document explains the different types of consol…
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial
Suggested Courses

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question