Memory usage

ZAMO · 01-09-2008, 04:48 AM

Hi,

The following happens in my server.

uptime
12:45:41 up 21 days, 4:40, 1 user, load average: 0.00, 0.00, 0.00

free
total used free shared buffers cached
Mem: 4037972 4007072 30900 0 28924 271976
-/+ buffers/cache: 3706172 331800
Swap: 4192888 184 4192704

How can i find out, which process is consuming the RAM memory? The load is low, but the memory is almost completely used.

Any suggestions?

colucix · 01-09-2008, 05:15 AM

At first you can have a look at the resource monitor. From the command line I'd look at "top" and move the sorting column using the ">" and "<" keys. In this way you can sort by the RES or the %MEM field (usually %CPU is the default).

You can extract the same information using "ps", for example like this

Code:

ps -eo pid,user,rss,pcpu,pmem,comm --sort=-rss

ZAMO · 01-09-2008, 05:29 AM

Colucix,
Great. It works.

< and > , Is there more options to view top results. If you can, Please provide a good link of it.

Thanks again

syg00 · 01-09-2008, 05:36 AM

"man top" - personally I prefer to use a config file; that way I get what I want everytime I start up top.

colucix · 01-09-2008, 05:42 AM

See man top, in particular section "3. Interactive Commands" or look for some good article or tutorial, like this. Just out of curiosity, have you found the memory consuming process?

ZAMO · 01-09-2008, 05:46 AM

Yes ,

It was the java , which is eating the RAM upto 85%

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
529 zamo 17 0 4947m 3.3g 69m S 0.0 85.9 0:15.18 java

Thank you Both

ZAMO · 01-16-2008, 06:30 AM

Everyone,
In the above post, Java is consuming a lot of RAM. I used to restart the tomcat(java) to fix this issue. Is there anyway to fix this , without restarting the tomcat server.

Thanks in Advance.