Server Load

amartlk · 03-09-2011, 04:54 AM

hi

i have centos 5.3 64 bit installed on server , server configuration is as -
800 gb H/D, 2GB Ram, processor quadcore AMD opteron 1354 and open souce Application like mantis bug trakers, dotproject,svn etc.
i want to check the current load on server and how much load it can handled , how it is possible

Noway2 · 03-09-2011, 05:11 AM

Use the 'top' command.

mesiol · 03-09-2011, 05:13 AM

Hi,

the only correct answer will be: "Benchmark your system by running your software as used by your users" all other answers are expectations.

The load handled by your system depends on the use case. No one will be able to give you any exact value without knowing the use case of your system.

If you are only interested in an unix load estimation you can say "a load of 1 per core in the system can be handled".

Current load can be checked using

Code:

uptime

command.

amartlk · 03-09-2011, 05:32 AM

thanks for reply

now i have 20 users which works ok but probably users will increased may be up to 100 will then it will effect performance as server configuration already mention?

mesiol · 03-10-2011, 07:27 AM

Hi,

what are your actual load values?

amartlk · 03-11-2011, 02:38 AM

i dont have any load value it will increase and current hardware and s/w are already mention i need to calculate exact load and can it balance that load

mesiol · 03-11-2011, 04:56 AM

Hi,

are you sure that you really know what you really want? If you already have a system where users are working on you could determine the actual load values on the system using tools like

Code:

top
sar
uptime
iostat
vmstat

Did you have used any of these tools? Did you read the man pages?

These tools will provide you with all required information about system load, process information, virtual memory usage and io values to calculate how system usage will increase if number of users will increase.

I strongly recolomend you first to read the man pages for the different tools. After that collect data and learn how to interpret the values collected.

It does not help telling us the hardware and software without providing any use case information.

amartlk · 03-14-2011, 04:51 AM

thanks
will check installed and check the tools

amartlk · 03-14-2011, 06:11 AM

hi
i installed sysstat package , now able to use command iostat,sar,mpstat but i want to known which values are better in the resp commands pls help,

amartlk · 03-15-2011, 05:59 AM

pls reply

Noway2 · 03-15-2011, 07:45 AM

Quote:

pls reply

Ok, how about PLEASE don't bump your thread with text that doesn't contribute to the topic just because you haven't gotten a response in 24 hours.

If you are not getting the response you want, perhaps you need to rephrase and elaborate more on what it is that you want to know. Personally, I have not used the sysstat package. Even so, the question of "which values are better in the resp commands" isn't entirely clear. For starters, what does resp mean? Does it mean in response, respect, respite, responsible? This is why it is important that you spell out your words instead of using text message slang and abbreviations. It is also unclear what you are trying to make a comparison of when you mean better. Please elaborate.

co_bofh · 03-15-2011, 08:47 AM

You should investigate something like rrdtool in order to help monitor trending of the server. You can use top and the others to see the current performance of the server but without a performance management tool, it's a lot harder to track and identify when a server is starting to be overloaded. Personally I hate being reactive when I can be proactive and alert folks before things get to be problems.

rrdtool isn't the only one of course. I wrote several scripts to capture information and create graphs for my environment using rrdtool. There are other tools that can provide the info out of the box.

Carl