Re: Apache + mod_php performance

Liste des GroupesRevenir à co vms 
Sujet : Re: Apache + mod_php performance
De : davef (at) *nospam* tsoft-inc.com (Dave Froble)
Groupes : comp.os.vms
Date : 01. Oct 2024, 02:10:51
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vdfi7t$2ema9$1@dont-email.me>
References : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
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On 9/30/2024 8:33 PM, Arne Vajhøj wrote:
On 9/30/2024 8:24 PM, Lawrence D'Oliveiro wrote:
On Mon, 30 Sep 2024 19:50:38 -0400, Arne Vajhøj wrote:
On 9/29/2024 11:15 PM, Lawrence D'Oliveiro wrote:
On Sun, 29 Sep 2024 22:34:04 -0400, Arne Vajhøj wrote:
But I am pretty sure that it will not work on VMS.
>
That’s what I figured. VMS, like Windows, really wants you to use
threads.
>
For massive parallel processing on VMS then threads not
processes is the way to go.
>
Threads require shared memory, though. Processes allow you to have a mix
of shared and private data, plus the use of IPC mechanisms like message
passing. This makes for a looser coupling, which better suits the way
massively parallel systems are built.
>
It is undeniable that multiple processes are more loosely coupled
than multiple threads.
>
But efficiency is a problem. VMS does not do fork. Process creation
is expensive on VMS. None of that fancy moving descriptors over
Unix socket stuff.
>
VMS got plenty of methods for IPC. A solution with a fixed number
of processes doing IPC between each other may work fine.
>
But the concept of constantly starting new processes and killing
old processes is not going to perform great.
>
Arne
>
Well, now, that is a rather bold statement.
Granted, starting up a new process involves some overhead.
But it really depends upon the requirements.  The more use out of a process once it is started, the better overall performance.  If a group of worker processes is started once, then used for many tasks, then that overhead happens only once.   Perhaps once a day, week, month, and even year.  There are various communication methods available on VMS.
In the end, it comes down to the requirements.  An engineer must evaluate the task(s) and determine what methods will give adequate results.
--
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef@tsoft-inc.com
DFE Ultralights, Inc.
170 Grimplin Road
Vanderbilt, PA  15486

Date Sujet#  Auteur
24 Sep 24 * Apache + mod_php performance274Arne Vajhøj
24 Sep 24 +* Re: Apache + mod_php performance267Dan Cross
25 Sep 24 i`* Re: Apache + mod_php performance266Arne Vajhøj
25 Sep 24 i `* Re: Apache + mod_php performance265Dan Cross
25 Sep 24 i  `* Re: Apache + mod_php performance264Arne Vajhøj
25 Sep 24 i   +* Re: Apache + mod_php performance262Dan Cross
25 Sep 24 i   i`* Re: Apache + mod_php performance261Arne Vajhøj
25 Sep 24 i   i +* Re: Apache + mod_php performance12Arne Vajhøj
25 Sep 24 i   i i+- Re: Apache + mod_php performance1Lawrence D'Oliveiro
25 Sep 24 i   i i+* Re: Apache + mod_php performance3Lawrence D'Oliveiro
26 Sep 24 i   i ii`* Re: Apache + mod_php performance2Arne Vajhøj
26 Sep 24 i   i ii `- Re: Apache + mod_php performance1Lawrence D'Oliveiro
26 Sep 24 i   i i`* Re: Apache + mod_php performance7Craig A. Berry
26 Sep 24 i   i i +- Re: Apache + mod_php performance1Arne Vajhøj
26 Sep 24 i   i i `* Re: Apache + mod_php performance5Lawrence D'Oliveiro
27 Sep 24 i   i i  `* Re: Apache + mod_php performance4Arne Vajhøj
27 Sep 24 i   i i   `* Re: Apache + mod_php performance3Lawrence D'Oliveiro
27 Sep 24 i   i i    `* Re: Apache + mod_php performance2Craig A. Berry
27 Sep 24 i   i i     `- Re: Apache + mod_php performance1Lawrence D'Oliveiro
25 Sep 24 i   i +- Re: Apache + mod_php performance1Arne Vajhøj
26 Sep 24 i   i +* Re: Apache + mod_php performance21Arne Vajhøj
26 Sep 24 i   i i+* Re: Apache + mod_php performance3Lawrence D'Oliveiro
26 Sep 24 i   i ii`* Re: Apache + mod_php performance2Arne Vajhøj
26 Sep 24 i   i ii `- Re: Apache + mod_php performance1Lawrence D'Oliveiro
26 Sep 24 i   i i`* Re: Apache + mod_php performance17Craig A. Berry
26 Sep 24 i   i i `* Re: Apache + mod_php performance16Craig A. Berry
26 Sep 24 i   i i  +* Re: Apache + mod_php performance2Chris Townley
26 Sep 24 i   i i  i`- Re: Apache + mod_php performance1Arne Vajhøj
27 Sep 24 i   i i  `* Re: Apache + mod_php performance13Arne Vajhøj
27 Sep 24 i   i i   `* Re: Apache + mod_php performance12Lawrence D'Oliveiro
27 Sep 24 i   i i    `* Re: Apache + mod_php performance11Arne Vajhøj
27 Sep 24 i   i i     +* Re: Apache + mod_php performance3Lawrence D'Oliveiro
27 Sep 24 i   i i     i`* Re: Apache + mod_php performance2Arne Vajhøj
28 Sep 24 i   i i     i `- Re: Apache + mod_php performance1Lawrence D'Oliveiro
27 Sep 24 i   i i     +* Re: Apache + mod_php performance2Simon Clubley
27 Sep 24 i   i i     i`- Re: Apache + mod_php performance1Arne Vajhøj
27 Sep 24 i   i i     `* Re: Apache + mod_php performance5Craig A. Berry
27 Sep 24 i   i i      `* Re: Apache + mod_php performance4Arne Vajhøj
27 Sep 24 i   i i       `* Re: Apache + mod_php performance3Dan Cross
27 Sep 24 i   i i        `* Re: Apache + mod_php performance2Arne Vajhøj
27 Sep 24 i   i i         `- Re: Apache + mod_php performance1Dan Cross
26 Sep 24 i   i +* Re: Apache + mod_php performance38Dan Cross
27 Sep 24 i   i i`* Re: Apache + mod_php performance37Arne Vajhøj
27 Sep 24 i   i i +* Re: Apache + mod_php performance2Chris Townley
27 Sep 24 i   i i i`- Re: Apache + mod_php performance1Arne Vajhøj
27 Sep 24 i   i i +* Re: Apache + mod_php performance9Dan Cross
27 Sep 24 i   i i i`* Re: Apache + mod_php performance8Arne Vajhøj
27 Sep 24 i   i i i `* Re: Apache + mod_php performance7Dan Cross
27 Sep 24 i   i i i  `* Re: Apache + mod_php performance6Arne Vajhøj
27 Sep 24 i   i i i   `* Re: Apache + mod_php performance5Dan Cross
27 Sep 24 i   i i i    `* Re: Apache + mod_php performance4Arne Vajhøj
27 Sep 24 i   i i i     `* Re: Apache + mod_php performance3Dan Cross
27 Sep 24 i   i i i      `* Re: Apache + mod_php performance2Arne Vajhøj
27 Sep 24 i   i i i       `- Re: Apache + mod_php performance1Dan Cross
28 Sep 24 i   i i `* Re: Apache + mod_php performance25Lawrence D'Oliveiro
28 Sep 24 i   i i  `* Re: Apache + mod_php performance24Arne Vajhøj
28 Sep 24 i   i i   `* Re: Apache + mod_php performance23Lawrence D'Oliveiro
28 Sep 24 i   i i    `* Re: Apache + mod_php performance22Arne Vajhøj
28 Sep 24 i   i i     +* Re: Apache + mod_php performance7Lawrence D'Oliveiro
28 Sep 24 i   i i     i`* Re: Apache + mod_php performance6Arne Vajhøj
28 Sep 24 i   i i     i `* Re: Apache + mod_php performance5Lawrence D'Oliveiro
28 Sep 24 i   i i     i  `* Re: Apache + mod_php performance4Arne Vajhøj
28 Sep 24 i   i i     i   `* Re: Apache + mod_php performance3Lawrence D'Oliveiro
28 Sep 24 i   i i     i    `* Re: Apache + mod_php performance2Arne Vajhøj
28 Sep 24 i   i i     i     `- Re: Apache + mod_php performance1Lawrence D'Oliveiro
28 Sep 24 i   i i     `* Re: Apache + mod_php performance14Arne Vajhøj
28 Sep 24 i   i i      `* Re: Apache + mod_php performance13Lawrence D'Oliveiro
28 Sep 24 i   i i       `* Re: Apache + mod_php performance12Arne Vajhøj
28 Sep 24 i   i i        +* Re: Apache + mod_php performance3Arne Vajhøj
28 Sep 24 i   i i        i`* Re: Apache + mod_php performance2Lawrence D'Oliveiro
28 Sep 24 i   i i        i `- Re: Apache + mod_php performance1Arne Vajhøj
28 Sep 24 i   i i        `* Re: Apache + mod_php performance8Lawrence D'Oliveiro
28 Sep 24 i   i i         `* Re: Apache + mod_php performance7Arne Vajhøj
28 Sep 24 i   i i          +- Re: Apache + mod_php performance1Chris Townley
28 Sep 24 i   i i          `* Re: Apache + mod_php performance5Lawrence D'Oliveiro
29 Sep 24 i   i i           +- Re: Apache + mod_php performance1Arne Vajhøj
29 Sep 24 i   i i           `* Re: Apache + mod_php performance3Craig A. Berry
29 Sep 24 i   i i            +- Re: Apache + mod_php performance1Arne Vajhøj
30 Sep 24 i   i i            `- Re: Apache + mod_php performance1Lawrence D'Oliveiro
28 Sep 24 i   i `* Re: Apache + mod_php performance188Arne Vajhøj
28 Sep 24 i   i  +* Re: Apache + mod_php performance56Dan Cross
28 Sep 24 i   i  i+* Re: Apache + mod_php performance51Arne Vajhøj
28 Sep 24 i   i  ii+- Re: Apache + mod_php performance1Lawrence D'Oliveiro
28 Sep 24 i   i  ii+* Re: Apache + mod_php performance48Dave Froble
1 Oct 24 i   i  iii`* Re: Apache + mod_php performance47Dan Cross
1 Oct 24 i   i  iii `* Re: Apache + mod_php performance46Arne Vajhøj
1 Oct 24 i   i  iii  +* Re: Apache + mod_php performance7Lawrence D'Oliveiro
2 Oct 24 i   i  iii  i`* Re: Apache + mod_php performance6Arne Vajhøj
2 Oct 24 i   i  iii  i `* Re: Apache + mod_php performance5Lawrence D'Oliveiro
3 Oct 24 i   i  iii  i  `* Re: Apache + mod_php performance4Arne Vajhøj
3 Oct 24 i   i  iii  i   `* Re: Apache + mod_php performance3Lawrence D'Oliveiro
3 Oct 24 i   i  iii  i    `* Re: Apache + mod_php performance2Arne Vajhøj
3 Oct 24 i   i  iii  i     `- Re: Apache + mod_php performance1Lawrence D'Oliveiro
2 Oct 24 i   i  iii  +* Re: Apache + mod_php performance5Dan Cross
2 Oct 24 i   i  iii  i`* Re: Apache + mod_php performance4Arne Vajhøj
2 Oct 24 i   i  iii  i `* Re: Apache + mod_php performance3Dan Cross
2 Oct 24 i   i  iii  i  `* Re: Apache + mod_php performance2Arne Vajhøj
2 Oct 24 i   i  iii  i   `- Re: Apache + mod_php performance1Dan Cross
2 Oct 24 i   i  iii  `* Re: Apache + mod_php performance33Dave Froble
2 Oct 24 i   i  iii   +* Re: Apache + mod_php performance31Arne Vajhøj
2 Oct 24 i   i  iii   i`* Re: Apache + mod_php performance30Dan Cross
2 Oct 24 i   i  iii   `- Re: Apache + mod_php performance1Dan Cross
30 Sep 24 i   i  ii`- Re: Apache + mod_php performance1Dan Cross
29 Sep 24 i   i  i`* Re: Apache + mod_php performance4Arne Vajhøj
28 Sep 24 i   i  `* Re: Apache + mod_php performance131Arne Vajhøj
27 Sep 24 i   `- Re: Apache + mod_php performance1Arne Vajhøj
24 Sep 24 +* Re: Apache + mod_php performance2Lawrence D'Oliveiro
25 Sep 24 +* Re: Apache + mod_php performance2Simon Clubley
2 Oct 24 `* Re: Apache + mod_php performance2Arne Vajhøj

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