Why the limit of MEM are difference between tow OpenFire server

Openfire Openfire Support
1

My Openfire is 3.6.3.

I have two Linux servers:

First server has memory: 3632576

Second server has memory: 8182972

It is very strange about limit of memory,

on first server, I can set maximum memory is 1792m,

but on second server, I just can set maximum memory is 1536m.

I don’t know why different between them, and I had already closed all other JVM applications, and “free” returned follow information:

first server:

            total          used        free         shared     buffers     cached

Mem: 3632576 747900 2884676 0 147548 315884

second server:

           total           used         free         shared     buffers     cached

Mem: 8182972 4837376 3345596 0 318084 3999588

Who can tell me what is problem and how to set tham

Thanks

2

Does these servers use the same OS?

3

yes, they are different.

one is Red Hat Linux release 8.0 (Psyche);

other is CentOS release 5 (Final);

But I don’t know why can not import the limit of memory, and I has already shutted down some other applications to release the memory , and many free memory does not used.

And how do I do I can import the limit of memory to 2048M.

4

RH 8.0? Looks like very old I’m not sure, but this can be also a limitation ov Java JVM. What Java versions are on both servers?

5

Red Hat Linux release 8.0 (Psyche): (limit is 1536M)

java version “1.6.0_14”

Java™ SE Runtime Environment (build 1.6.0_14-b08)

Java HotSpot™ Server VM (build 14.0-b16, mixed mode)

CentOS release 5 (Final): (limit is 1792M)

java version "1.5.0_12"
Java™ 2 Runtime Environment, Standard Edition (build 1.5.0_12-b04)
Java HotSpot™ Client VM (build 1.5.0_12-b04, mixed mode, sharing)

6

About this my root question is how can set the MEM limit is 2048M, now I just can set it with 1536M. it is not enough for me

Could you help me, thanks.