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тАО02-03-2010 02:17 AM
тАО02-03-2010 02:17 AM
Recently we deployed an appln on PROD server after testing it on test server.
It is a web based timesheet appln which has a mysql database hosted on Linux server.
After we were satisfied with the testing of appln and database we migrated it to PROD. But the appln has been behaving weird.
The data fetching is very slow on the PROD server. we also tested the appln/DB on dev server. The performance was acceptable.
I have attached some statistics to compare all 3 servers.
After looking at many things i am not able to point to something for the slow response on PROD server. There are many differentiating points among the 3 machines; but which one is most responsible for slow response is still a mystery to me.
Can you guide me through this
Sunny
Solved! Go to Solution.
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тАО02-03-2010 03:21 AM
тАО02-03-2010 03:21 AM
Re: slow performance of the server
From your sheet, I can understand that your prod is the oldest machine from all. You should upgrade at least your OS.
What is the output of
cat /proc/cpuinfo
for all those systems?
Horia.
Horia.
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тАО02-03-2010 03:26 AM
тАО02-03-2010 03:26 AM
Re: slow performance of the server
Yes, PROD is the oldest.
My last resort would be to upgrade the OS, may also get a new server completely.
However, i want to try all possible things before that
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тАО02-03-2010 03:37 AM
тАО02-03-2010 03:37 AM
Re: slow performance of the server
Horia.
Horia.
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тАО02-03-2010 03:41 AM
тАО02-03-2010 03:41 AM
Re: slow performance of the server
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тАО02-03-2010 03:59 AM
тАО02-03-2010 03:59 AM
Re: slow performance of the server
How about installed memory/swap size?
You should upgrade the OS.
Horia.
Horia.
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тАО02-03-2010 04:01 AM
тАО02-03-2010 04:01 AM
Re: slow performance of the server
Horia.
Horia.
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тАО02-03-2010 04:08 AM
тАО02-03-2010 04:08 AM
Re: slow performance of the server
I guess that is enough physical memory.
I had a doubt if i need to keep the physmem and swap equal or double but people recommended to keep it as it is as physical mem is enough so that swap would be hardly be used.
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тАО02-03-2010 05:02 AM
тАО02-03-2010 05:02 AM
Re: slow performance of the server
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1344830
Do you ever get core dumps with out of memory messages?
Does not hurt to make it 6G swap. If your HDD space is not a premium, you should consider it making swap bigger: 10-12G maybe?. Always use dedicated partitions for swap.
Horia.
Horia.
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тАО02-03-2010 08:38 PM
тАО02-03-2010 08:38 PM
Re: slow performance of the server
But increasing the swap won't solve the problem at hand. Because the appln is not memory intensive and i have sufficient phy mem to suffice the appl needs.
I have 2 options
1. Change the HDD and scsi controller which has better throughput
2. Update the OS
Are there more options before i change h/w or s/w
Can it be a problem with device drivers??
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тАО02-03-2010 09:48 PM
тАО02-03-2010 09:48 PM
Re: slow performance of the server
This will be a problem solved with OS upgrade.
Installing/compiling new drivers on the same OS would require updating some of the system libraries and you will only loose time.
You can also try to install a newer kernel.
But again, my first choice would be to upgrade the OS.
Horia.
Horia.
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тАО02-03-2010 10:03 PM
тАО02-03-2010 10:03 PM
Re: slow performance of the server
So getting a new kernel would be difficult.
The current level is 2.4.21-9.ELsmp
Is there any other source from where i can get kernel update? which i can rely on
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тАО02-04-2010 12:37 AM
тАО02-04-2010 12:37 AM
Re: slow performance of the server
the latest 2.4 version is 2.4.37.9.
You could try a
yum update kernel
Alternatively, if you have installed the development tools you could install the source and compile it by yourself as you like. In this case you would keep only what you would need in your system.
Horia.
Horia.
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тАО04-10-2010 05:55 AM
тАО04-10-2010 05:55 AM
Solutioncollectl -s+m
Only after you determine WHICH resource is having issues can you take the next step of trying to fix the problem.
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тАО04-10-2010 10:24 PM
тАО04-10-2010 10:24 PM
Re: slow performance of the server
As masny others, I suggest you to upgrade your OS. You can either upgrade to RHEL/CENTOS 5 or upgrade RHEL3 to the latest update level using CENTOS repositories.
I don't think that hardware is a problem in this case.