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Posted to users@httpd.apache.org by Andrew Kunz <ku...@tdbank.ca> on 2002/04/04 17:48:59 UTC
memory
How is anyone calculating memory usage per httpd process? I need to
understand the impact of 300 vrs 600 maxclients
RE: memory
Posted by Andrew Kunz <ku...@tdbank.ca>.
Sorry yes apache 1.3 aix 4.3
-----Original Message-----
From: Bill -Sx- Jones [mailto:sneex@mac.com]
Sent: Thursday, April 04, 2002 11:17 AM
To: users@httpd.apache.org
Subject: Re: memory
On 4/4/02 11:13 AM, "Andrew Kunz" <ku...@tdbank.ca> wrote:
> Yes on aix.
>
> A little question about each process showing about 3 Megs of real and
24
> Megs of virtual (or shared I hope). Seems like a lot of memory to be
> consumed per process and I am wondering if that other amount (virtual)
> is shared among all the processes so the net impact is only 3 Megs per
> process. I assume it is because it would be a pig if you needed to
> allocate much over that per process but I kind of need an answer to
> satisfy myself. (As in gigs of memory on a busy machine?)
You still need to say what version of apache
Apache 2 uses shared a lot better than 1.3 does
What version of AIX ? 3/4/5 ???
HTH;
-Sx- :]
My new personal quote:
Be alert! The world needs more Lerts! :)
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Re: memory
Posted by Bill -Sx- Jones <sn...@mac.com>.
On 4/4/02 11:13 AM, "Andrew Kunz" <ku...@tdbank.ca> wrote:
> Yes on aix.
>
> A little question about each process showing about 3 Megs of real and 24
> Megs of virtual (or shared I hope). Seems like a lot of memory to be
> consumed per process and I am wondering if that other amount (virtual)
> is shared among all the processes so the net impact is only 3 Megs per
> process. I assume it is because it would be a pig if you needed to
> allocate much over that per process but I kind of need an answer to
> satisfy myself. (As in gigs of memory on a busy machine?)
You still need to say what version of apache
Apache 2 uses shared a lot better than 1.3 does
What version of AIX ? 3/4/5 ???
HTH;
-Sx- :]
My new personal quote:
Be alert! The world needs more Lerts! :)
---------------------------------------------------------------------
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RE: memory
Posted by Andrew Kunz <ku...@tdbank.ca>.
Yes on aix.
A little question about each process showing about 3 Megs of real and 24
Megs of virtual (or shared I hope). Seems like a lot of memory to be
consumed per process and I am wondering if that other amount (virtual)
is shared among all the processes so the net impact is only 3 Megs per
process. I assume it is because it would be a pig if you needed to
allocate much over that per process but I kind of need an answer to
satisfy myself. (As in gigs of memory on a busy machine?)
Andrew
-----Original Message-----
From: alex dyas [mailto:adyas@twowaytv.co.uk]
Sent: Thursday, April 04, 2002 11:05 AM
To: users@httpd.apache.org
Subject: Re: memory
if you're talking unix, top may give you what you want.
alex..
Andrew Kunz wrote:
> How is anyone calculating memory usage per httpd process? I need to
> understand the impact of 300 vrs 600 maxclients
>
--
-= alex dyas - webmaster - twowaytv - uk =-
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Re: memory
Posted by alex dyas <ad...@twowaytv.co.uk>.
if you're talking unix, top may give you what you want.
alex..
Andrew Kunz wrote:
> How is anyone calculating memory usage per httpd process? I need to
> understand the impact of 300 vrs 600 maxclients
>
--
-= alex dyas - webmaster - twowaytv - uk =-
---------------------------------------------------------------------
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Re: memory
Posted by Bill -Sx- Jones <sn...@mac.com>.
On 4/4/02 11:28 AM, "Bill -Sx- Jones" <sn...@mac.com> wrote:
> On 4/4/02 11:21 AM, "Andrew Kunz" <ku...@tdbank.ca> wrote:
>
>> 11 million hits on an average day (approaching 400 hits per second at
Well, my 2 primary on-line E-Learning systems for courseware are doing about
1 request per second -- so they are mostly sleeping :/
WebCT averages 65 requesst per minute with 130 per second peak load...
Bbd averages about 40 http and 80 DB request per minute with very high per
second peak loads at times :(
But over all, it gives me more time to play Unreal Tournament !
:-D
-Sx- :]
My new personal quote:
Be alert! The world needs more Lerts! :)
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RE: memory
Posted by Andrew Kunz <ku...@tdbank.ca>.
Thanks bill really appreciate your assistance.
-----Original Message-----
From: Bill -Sx- Jones [mailto:sneex@mac.com]
Sent: Thursday, April 04, 2002 11:29 AM
To: users@httpd.apache.org
Subject: Re: memory
On 4/4/02 11:21 AM, "Andrew Kunz" <ku...@tdbank.ca> wrote:
> 11 million hits on an average day (approaching 400 hits per second at
> peak). Our other memory consumers are websphere and jvms so the
> calculation for allocating memory there is easy since they are fixed.
>
> I'm really only worried about peak numbers (we do hit them under
backend
> slowdowns) so based on what your saying is it safe to assume for
apache
>
> (Maxclients) * (ppid memory consumption) = (max expected consumed
> memory)
Yes - to be safe you would need about 1.8e+10 RAM or about
18,000,000,000
*virtual* bytes during those *load* seconds...
I would hazard from my AIX 4x days that it would mean a machine with 4GB
of
real RAM should be able to handle it.
Apache 2.0 handles shared better, however...
-Sx- :]
My new personal quote:
Be alert! The world needs more Lerts! :)
---------------------------------------------------------------------
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Project.
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Re: memory
Posted by Bill -Sx- Jones <sn...@mac.com>.
On 4/4/02 11:21 AM, "Andrew Kunz" <ku...@tdbank.ca> wrote:
> 11 million hits on an average day (approaching 400 hits per second at
> peak). Our other memory consumers are websphere and jvms so the
> calculation for allocating memory there is easy since they are fixed.
>
> I'm really only worried about peak numbers (we do hit them under backend
> slowdowns) so based on what your saying is it safe to assume for apache
>
> (Maxclients) * (ppid memory consumption) = (max expected consumed
> memory)
Yes - to be safe you would need about 1.8e+10 RAM or about 18,000,000,000
*virtual* bytes during those *load* seconds...
I would hazard from my AIX 4x days that it would mean a machine with 4GB of
real RAM should be able to handle it.
Apache 2.0 handles shared better, however...
-Sx- :]
My new personal quote:
Be alert! The world needs more Lerts! :)
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
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RE: memory
Posted by Andrew Kunz <ku...@tdbank.ca>.
11 million hits on an average day (approaching 400 hits per second at
peak). Our other memory consumers are websphere and jvms so the
calculation for allocating memory there is easy since they are fixed.
I'm really only worried about peak numbers (we do hit them under backend
slowdowns) so based on what your saying is it safe to assume for apache
(Maxclients) * (ppid memory consumption) = (max expected consumed
memory)
Andrew
-----Original Message-----
From: Bill -Sx- Jones [mailto:sneex@mac.com]
Sent: Thursday, April 04, 2002 11:13 AM
To: users@httpd.apache.org
Subject: Re: memory
On 4/4/02 10:48 AM, "Andrew Kunz" <ku...@tdbank.ca> wrote:
> How is anyone calculating memory usage per httpd process? I need to
> understand the impact of 300 vrs 600 maxclients
>
>
On Unix, version 1.3.x, you do this:
Size of your main process TIMES the number you expect to SIMULTANEOUS
(say
150 per second) PLUS the number of local DB connections TIMES the size
of
any DB process EQUALS the amount of memory you must have during ANY
given
second ...
Something like that.
For example -
My E10k had 16GB RAM
My Apache processes run about 10MB each
The MySQL connections run about 50MB each
So, to serve 150 simultaneous connections per second I would really only
need aboujt 900MB ~1.2GB of RAM
600 MaxClients seems to be an awful lot to me anyhow...
HTH;
-Sx- :]
My new personal quote:
Be alert! The world needs more Lerts! :)
---------------------------------------------------------------------
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Project.
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Re: memory
Posted by Bill -Sx- Jones <sn...@mac.com>.
On 4/4/02 10:48 AM, "Andrew Kunz" <ku...@tdbank.ca> wrote:
> How is anyone calculating memory usage per httpd process? I need to
> understand the impact of 300 vrs 600 maxclients
>
>
On Unix, version 1.3.x, you do this:
Size of your main process TIMES the number you expect to SIMULTANEOUS (say
150 per second) PLUS the number of local DB connections TIMES the size of
any DB process EQUALS the amount of memory you must have during ANY given
second ...
Something like that.
For example -
My E10k had 16GB RAM
My Apache processes run about 10MB each
The MySQL connections run about 50MB each
So, to serve 150 simultaneous connections per second I would really only
need aboujt 900MB ~1.2GB of RAM
600 MaxClients seems to be an awful lot to me anyhow...
HTH;
-Sx- :]
My new personal quote:
Be alert! The world needs more Lerts! :)
---------------------------------------------------------------------
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