RT 3.8.8 on CentOS 5.5 slows down/hangs

RT Users
1

Hullo RT Community,
I finally have my RT 3.8.8 running on CentOS 5.5. It works fine but
usually slows down at some point, whereby the RT page take long to load,
even on refresh. This forces me to restart my Apache web server service
for it to respond fast enough. I have done this like 4 times now.

I thought our local DNS was slow in name resolution, so I tried
accessing the RT page using its IP but nothing changes.

Any ideas on where I could start troubleshooting? I need to pinpoint
what exactly slows it at some random point, say in the evening or
midmorning.

Regards,

Gregory Okoth
NOC Engineer

Email:noc@accesskenya.com
Tel: (254 20) 360 0908
Fax: (254 20)(254 20) 360 0001

2

Are you using fastcgi? If so, I highly recommend a regular cron job to
restart apache. We’ve found that fcgi will always make RT slower over time
on CentOS (once of many reasons we’re moving away from that platform)

Hope that helps,

Eric Dropps
Systems Engineer
ITA Software, Inc.-----Original Message-----
From: rt-users-bounces@lists.bestpractical.com
[mailto:rt-users-bounces@lists.bestpractical.com] On Behalf Of Gregory
Greafers
Sent: Saturday, January 08, 2011 3:47 AM
To: rt-users
Subject: [rt-users] RT 3.8.8 on CentOS 5.5 slows down/hangs

Hullo RT Community,
I finally have my RT 3.8.8 running on CentOS 5.5. It works fine but usually
slows down at some point, whereby the RT page take long to load, even on
refresh. This forces me to restart my Apache web server service for it to
respond fast enough. I have done this like 4 times now.

I thought our local DNS was slow in name resolution, so I tried accessing
the RT page using its IP but nothing changes.

Any ideas on where I could start troubleshooting? I need to pinpoint what
exactly slows it at some random point, say in the evening or midmorning.

Regards,

Gregory Okoth
NOC Engineer

Email:noc@accesskenya.com
Tel: (254 20) 360 0908
Fax: (254 20)(254 20) 360 0001

3

Hi Eric,
I am using mod_perl2, mysql. FastCGI is complex during setup - so I thought since am not so experienced in Linux [but the love is growing day by day! :slight_smile: ]

Regards,

Gregory Okoth
NOC Engineer
Email:
gregory@accesskenya.com
Web:
www.accesskenya.com-----Original Message-----
From: Eric Dropps [mailto:edropps@itasoftware.com]
Sent: Saturday, January 08, 2011 11:54 AM
To: gregory@accesskenya.com; ‘rt-users’
Subject: RE: [rt-users] RT 3.8.8 on CentOS 5.5 slows down/hangs

Are you using fastcgi? If so, I highly recommend a regular cron job to
restart apache. We’ve found that fcgi will always make RT slower over time
on CentOS (once of many reasons we’re moving away from that platform)

Hope that helps,

Eric Dropps
Systems Engineer
ITA Software, Inc.

-----Original Message-----
From: rt-users-bounces@lists.bestpractical.com
[mailto:rt-users-bounces@lists.bestpractical.com] On Behalf Of Gregory
Greafers
Sent: Saturday, January 08, 2011 3:47 AM
To: rt-users
Subject: [rt-users] RT 3.8.8 on CentOS 5.5 slows down/hangs

Hullo RT Community,
I finally have my RT 3.8.8 running on CentOS 5.5. It works fine but usually
slows down at some point, whereby the RT page take long to load, even on
refresh. This forces me to restart my Apache web server service for it to
respond fast enough. I have done this like 4 times now.

I thought our local DNS was slow in name resolution, so I tried accessing
the RT page using its IP but nothing changes.

Any ideas on where I could start troubleshooting? I need to pinpoint what
exactly slows it at some random point, say in the evening or midmorning.

Regards,

Gregory Okoth
NOC Engineer

Email:noc@accesskenya.com
Tel: (254 20) 360 0908
Fax: (254 20)(254 20) 360 0001

4

Hullo RT Community,
I finally have my RT 3.8.8 running on CentOS 5.5. It works fine but
usually slows down at some point, whereby the RT page take long to load,
even on refresh. This forces me to restart my Apache web server service
for it to respond fast enough. I have done this like 4 times now.

I thought our local DNS was slow in name resolution, so I tried
accessing the RT page using its IP but nothing changes.

Any ideas on where I could start troubleshooting? I need to pinpoint
what exactly slows it at some random point, say in the evening or
midmorning.

RT’s performance is somehow pegged to the performance of the database server
(MySQL, PgSQL or Oracle). So I suggest you take a tour of
mysqltuner.pl(this is a website that also leads you to a script to
help tune your MySQL
server).
That is a specific shot in only one aspect. There are others but you did not
say much about your Apache, MySQL server, server specs…

Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254733744121/+254722743223

Damn!!

5

We have the same problem

Fedora 9
Mysql
Apache http
mod_perl2

Everynight a cron restarts htppd and this keeps RT reasonably fast.

If we restart httpd anytime during the day it is ultra fast until a few hours later.

Naresh-----Original Message-----
From: “Eric Dropps” edropps@itasoftware.com
Sender: rt-users-bounces@lists.bestpractical.com
Date: Sat, 8 Jan 2011 03:54:21
To: gregory@accesskenya.com; 'rt-users’rt-users@lists.bestpractical.com
Subject: Re: [rt-users] RT 3.8.8 on CentOS 5.5 slows down/hangs

Are you using fastcgi? If so, I highly recommend a regular cron job to
restart apache. We’ve found that fcgi will always make RT slower over time
on CentOS (once of many reasons we’re moving away from that platform)

Hope that helps,

Eric Dropps
Systems Engineer
ITA Software, Inc.

-----Original Message-----
From: rt-users-bounces@lists.bestpractical.com
[mailto:rt-users-bounces@lists.bestpractical.com] On Behalf Of Gregory
Greafers
Sent: Saturday, January 08, 2011 3:47 AM
To: rt-users
Subject: [rt-users] RT 3.8.8 on CentOS 5.5 slows down/hangs

Hullo RT Community,
I finally have my RT 3.8.8 running on CentOS 5.5. It works fine but usually
slows down at some point, whereby the RT page take long to load, even on
refresh. This forces me to restart my Apache web server service for it to
respond fast enough. I have done this like 4 times now.

I thought our local DNS was slow in name resolution, so I tried accessing
the RT page using its IP but nothing changes.

Any ideas on where I could start troubleshooting? I need to pinpoint what
exactly slows it at some random point, say in the evening or midmorning.

Regards,

Gregory Okoth
NOC Engineer

Email:noc@accesskenya.com
Tel: (254 20) 360 0908
Fax: (254 20)(254 20) 360 0001

6

I am still experiencing this issue. At one instance when our RT had
hang, I used the top command and it listed several apache processes
(like 10).

I also read in a recent thread on this list titled [Any gotchas for load
balancing RT’s front end?] stating somewhere…

We have not needed to do this for RT yet, but you should provide
for some level of persistance for connections to leverage RT’s
internal caching. A pure round-robin load balance will have both
frontends doing more work than they need to do. It may also be
worth revisiting your settings for KeepAlive on your web servers
as well to maximize performance and minimize resource usage.

Could increasing the MaxKeepAliveRequests resolve anything? I have 100
in my httpd.conf. I assumed ‘load balancing’ might help in my
situation.

Any help will be appreciatedOn Sat, 2011-01-08 at 13:32 +0300, Odhiambo Washington wrote:

That is a specific shot in only one aspect. There are others but you
did not say much about your Apache, MySQL server, server specs…

Regards,

Gregory Okoth
NOC Engineer

Email:noc@accesskenya.com
Tel: (254 20) 360 0908
Fax: (254 20)(254 20) 360 0001