[Users] regarding memory usage

Arun Kumar arunvoip at gmail.com
Wed Jun 20 17:57:01 CEST 2007


can you please explain my first ques:

1. Is there any benefit of increasing the value of PKG_MEM_POOL_SIZE and
SHM_MEM_SIZE ?

/*used only if PKG_MALLOC is defined*/
#define PKG_MEM_POOL_SIZE 1024*1024

/*used if SH_MEM is defined*/
#define SHM_MEM_SIZE 32

thanks
arun

On 6/20/07, Morgan Gilroy <morgan at telappliant.com> wrote:
>
> If you use `free –m` it shows the amount of memory in mega bytes, should
> be easier to read.
>
>
>
> Mem:
>
>             Total: total memory in your system
>
>             Used: Memory used by all processes and disk cache etc..
>
>             Free: memory that is not being used at all
>
> (ignore the others as they are no longer used)
>
>
>
> -/+ buffers = same as above except not counting disk cache and other
> temporary memory usage. This is what is really being used.
>
>
>
> Swap: this is the swap space on the disk.
>
>
>
> When an application requests memory it first gets memory from the free
> memory, if there is not enough then it takes memory from the disk cache and
> other buffers. The cache is there just to speed up access but it can use a
> lot of ram.
>
>
>
> Look at `man free` or google if you want a further explanation.
>
>
> ------------------------------
>
> *From:* Arun Kumar [mailto:arunvoip at gmail.com]
> *Sent:* 20 June 2007 16:09
> *To:* Morgan Gilroy
> *Cc:* USER; serusers at lists.iptel.org
> *Subject:* Re: [Users] regarding memory usage
>
>
>
> # free
> total used free shared buffers cached
> Mem: 2074376 1740724 333652 0 72328 1280192
> -/+ buffers/cache: 388204 1686172
> Swap: 2031608 0 2031608
>
> can you please explain in brief all the info.
>
> thanks
> arun
>
> On 6/20/07, *Morgan Gilroy* <morgan at telappliant.com > wrote:
>
> The numbers shown for memory usage also include shared memory, ie memory
> used by multiple processes/threads, these shared areas will be counted
> multiple times.
>
>
>
> Use `free` to find the real amount of used memory on your server (look at
> the +/- buffers section)
>
>
> ------------------------------
>
> *From:* users-bounces at openser.org [mailto:users-bounces at openser.org] *On
> Behalf Of *Arun Kumar
> *Sent:* 20 June 2007 14:44
> *To:* USER; serusers at lists.iptel.org
> *Subject:* [Users] regarding memory usage
>
>
>
> Hi
>
> 1. Is there any benefit of increasing the value of  PKG_MEM_POOL_SIZE  and
> SHM_MEM_SIZE ?
>
> /*used only if PKG_MALLOC is defined*/
> #define PKG_MEM_POOL_SIZE 1024*1024
>
> /*used if SH_MEM is defined*/
> #define SHM_MEM_SIZE 32
>
>
> 2. I've compiled my ser with
>
> #define PKG_MEM_POOL_SIZE 1024*1024*512
>
> ans started using ser -m 100 option with children=4 and listening on two
> ips
>
> when I started memory usages was seems to fine for few days(3-4) less then
> 1GB but after that nealy  1.7 - 1.8 GB of memory usage and when I do top:
>
> 16165 root 15 0 617m 54m 36m S 0.3 2.7 0:16.34 ser
> 16167 root 15 0 617m 54m 36m S 0.3 2.7 0:15.89 ser
> 16164 root 15 0 617m 54m 36m S 0.3 2.7 0:16.29 ser
> 16166 root 15 0 617m 54m 36m S 0.7 2.7 0:16.16 ser
> 16172 root 16 0 617m 53m 35m S 0.0 2.7 0:05.04 ser
> 16168 root 16 0 617m 52m 34m S 0.0 2.6 0:00.09 ser
> 16170 root 16 0 617m 52m 34m S 0.0 2.6 0:00.07 ser
> 16169 root 16 0 617m 52m 34m S 0.0 2.6 0:00.08 ser
> 16171 root 16 0 617m 52m 34m S 0.0 2.6 0:00.10 ser
> 16163 root 16 0 617m 52m 34m S 0.0 2.6 0:00.01 ser
> 16145 root 25 0 617m 52m 34m S 0.0 2.6 0:07.80 ser
>
> it shows 11 instance of ser with above info. If I sum up
> 617 * 11 = 6787 MB of memory but in my machine I've only 2 GB Physical RAM
> and it never uses Swap ?
> if 54 * 11 =  594 ? but free -m and top shows more memory usage ?
>
> can please explain me in brief . I'll be really thankfull. B'coz of this
> I'm facing may problem.
>
> thanks
>
> arun
>
>
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