memory usage

memory usage

[gis88530]

Hello,

I can use "ps" to see memory usage of daemons and user programs.
I can't find any memory information of kernel with "top" and "ps".

Do you know how to take memory usage information of kernel ?
Thanks for your help.


Cheers,
Tom

Re: memory usage

[Andi Kleen]

On Wed, Apr 11, 2001 at 01:42:55AM +0800, gis88530 wrote:
> Hello,
> 
> I can use "ps" to see memory usage of daemons and user programs.
> I can't find any memory information of kernel with "top" and "ps".
> 
> Do you know how to take memory usage information of kernel ?

Try cat /proc/slabinfo


-Andi

Re: memory usage

[gis88530]

Thanks.
cat /proc/slabinfo look like as follows.
Each row have three columns.
Could you tell me what do they mean in second and third column?
kmem_cache        29     42
pio_request            0      0

My second question is:
We can find memory usage of daemon(apache) by ps or top.
e.g. apache use 5400k physical memory 

Does the memory usage of /proc/slabinfo include some of 
5400k ? I guess 5400k can separate into two part
(kernel space part and user space part). 

Is any thing wrong? Thanks
Cheers,
Tom

Re: memory usage

[Marcin Kowalski]

> I can use "ps" to see memory usage of daemons and user programs.
> I can't find any memory information of kernel with "top" and "ps".

> Do you know how to take memory usage information of kernel ?
> Thanks for your help.


Regarding this issue, I have a similar problem if I do a free on my system I 
get :
---   total       used       free     shared    buffers     cached
Mem:       1157444    1148120       9324          0      22080     459504
-/+ buffers/cache:     666536     490908
Swap:       641016      19072     621944
---
Now what I do a ps there seems no way to accound for the 500mb + of memory 
used. No single or group of processes uses that amount of memory. THis is 
very disconcerting, coupled with extremely high loads when cache is dumped to 
disk locking up the machine makes me want to move back to 2.2.19 from 2.4.3.

I would also be curious to see how the kernel is using memory...

TIA
MARCin


-- 
-----------------------------
     Marcin Kowalski
     Linux/Perl Developer
     Datrix Solutions
     Cel. 082-400-7603
      ***Open Source Kicks Ass***
-----------------------------