Fwd: [Samba] Samba memory usage - how big is it?

[Mike Gallamore]

Sorry forgot to include the list.
> From: Mike Gallamore <mike at mpi-cbg.de>
> Date: November 13, 2008 3:49:21 PM GMT+01:00
> To: Volker.Lendecke at SerNet.DE
> Subject: Re: [Samba] Samba memory usage - how big is it?
>
> I didn't include the whole output which would be about a page. Yeah  
> it is just a total of the columns. There is commands for excluding  
> shared memory regions, "anonymously allocated" parts etc.
>
> Yeah, probably is overkill for samba. We usually have about 16GB of  
> RAM in use between samba and the filesystem stuff. We are using SAM  
> QFS to handle hierarchal storage. There is a fair bit of non-sharing  
> load on the system, typically we have 5 LTO 4 tape drives running  
> either restoring or archiving data, and 3-10 processes scanning the  
> arrays for changes that need archiving which use ~140MB each. At the  
> moment showing a load of 28.5 on the system, busy busy :)
> On Nov 13, 2008, at 3:38 PM, Volker Lendecke wrote:
>
>> On Thu, Nov 13, 2008 at 02:29:38PM +0100, Mike Gallamore wrote:
>>> Similar on Solaris, they have a built in utility called pmap:
>>>
>>> pmap <pid> gives output just about total virtual memory, ex:
>>> FF3F6000       8K rwx--  /lib/ld.so.1
>>> FF3FA000       8K rwxs-    [ anon ]
>>> FFBE0000     128K rwx--    [ stack ]
>>> total     29632K
>>>
>>> pmap -x <pid> gives extended info ex:
>>> FF3F6000       8       8       8       - rwx--  ld.so.1
>>> FF3FA000       8       8       -       - rwxs-    [ anon ]
>>> FFBE0000     128     128      64       - rwx--    [ stack ]
>>> -------- ------- ------- ------- -------
>>> total Kb   29632   26088    1584       -
>>>
>>> We are currently running Samba 3.2.4 on our system. I can't remember
>>> what our memory footprint was before we upgraded from 3.0.24. That
>>> said, with the amount of RAM on our system we don't get more than  
>>> 70%
>>> RAM use at any time, even while driving 2 tape robots and 30
>>> filesystem/raid arrays from the box.
>>
>> Well, 32GB for just 117 users is just way over the top.
>> Samba alone should be able to work with a LOT less memory.
>> How does the Solaris pmap calculate the 29632k? Adding up
>> the numbers above that I end up at 144k which is probably
>> too little.
>>
>> Volker
>