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OPcache in php5.5.1 on Windows [message #182365] Wed, 31 July 2013 08:50 Go to next message
Erwin Moller is currently offline  Erwin Moller
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Hello cpl,

Does anybody in here have experience with OPCache under windows?
http://nl3.php.net/opcache
It is bundled in PHP5.5 (and via PECL in earlier versions).

I installed PHP5.5.1 on a SBS2008 server under IIS7 (fast cgi).
After activating opcache, I used the suggested directives in php.ini, as
described here:
http://nl3.php.net/manual/en/opcache.configuration.php

It does show up now in phpinfo() as:

Opcode Caching Up and Running
Optimization Enabled
Startup OK
Shared memory model win32
Cache hits 12
Cache misses 15
Used memory 5752832
Free memory 61356032
Wasted memory 0
Cached scripts 15
Cached keys 21
Max keys 3907
OOM restarts 0
Hash keys restarts 0
Manual restarts 0

So far so good (I think).


Now I wonder: Is there any way to find out WHAT kind of performance gain
it gives?

I have a few ideas but I am not very enthusiastic about any of them:

1) Testing the time spend in the script: Not good, that is exclusive the
time needed to interpret the script (I expect, but I couldn't find a
decisive answer yet. If anybody knows, let me know please)

2) From end-user experience: Not good: If I time the responsetimes with
a clockwatch on my browser, I merely measure noise I expect: time spend
on the network, is the server busy doing other stuff, is the database
busy, etc.

3) Making a huge complicated script, and test it. Hoping the time needed
to interpret it is so long I can measure the difference as described in
2. (I haven't done this yet)

What would be a good way to test the speedgains by using OPCache?
Any ideas?

Thanks for your time.

Regards,
Erwin Moller



--
"That which can be asserted without evidence, can be dismissed without
evidence."
-- Christopher Hitchens
Re: OPcache in php5.5.1 on Windows [message #182367 is a reply to message #182365] Wed, 31 July 2013 09:29 Go to previous messageGo to next message
Jerry Stuckle is currently offline  Jerry Stuckle
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On 7/31/2013 8:50 AM, Erwin Moller wrote:
> Hello cpl,
>
> Does anybody in here have experience with OPCache under windows?
> http://nl3.php.net/opcache
> It is bundled in PHP5.5 (and via PECL in earlier versions).
>
> I installed PHP5.5.1 on a SBS2008 server under IIS7 (fast cgi).
> After activating opcache, I used the suggested directives in php.ini, as
> described here:
> http://nl3.php.net/manual/en/opcache.configuration.php
>
> It does show up now in phpinfo() as:
>
> Opcode Caching Up and Running
> Optimization Enabled
> Startup OK
> Shared memory model win32
> Cache hits 12
> Cache misses 15
> Used memory 5752832
> Free memory 61356032
> Wasted memory 0
> Cached scripts 15
> Cached keys 21
> Max keys 3907
> OOM restarts 0
> Hash keys restarts 0
> Manual restarts 0
>
> So far so good (I think).
>
>
> Now I wonder: Is there any way to find out WHAT kind of performance gain
> it gives?
>
> I have a few ideas but I am not very enthusiastic about any of them:
>
> 1) Testing the time spend in the script: Not good, that is exclusive the
> time needed to interpret the script (I expect, but I couldn't find a
> decisive answer yet. If anybody knows, let me know please)
>
> 2) From end-user experience: Not good: If I time the responsetimes with
> a clockwatch on my browser, I merely measure noise I expect: time spend
> on the network, is the server busy doing other stuff, is the database
> busy, etc.
>
> 3) Making a huge complicated script, and test it. Hoping the time needed
> to interpret it is so long I can measure the difference as described in
> 2. (I haven't done this yet)
>
> What would be a good way to test the speedgains by using OPCache?
> Any ideas?
>
> Thanks for your time.
>
> Regards,
> Erwin Moller
>
>
>

Think about this: No matter how you do it, the only important
measurement is response time to the end user (system load is related,
and can also affect response time). Building a huge, complicated script
which shows a 70% performance game may make you feel better - but will
not be representative of the real world.


--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex(at)attglobal(dot)net
==================
Re: OPcache in php5.5.1 on Windows [message #182373 is a reply to message #182365] Thu, 01 August 2013 10:00 Go to previous messageGo to next message
Goran is currently offline  Goran
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Best way to benchmark it is to hit your testing server with your
production access log.
Re: OPcache in php5.5.1 on Windows [message #182379 is a reply to message #182365] Thu, 01 August 2013 17:21 Go to previous messageGo to next message
Adam Harvey is currently offline  Adam Harvey
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On Wed, 31 Jul 2013 14:50:19 +0200, Erwin Moller wrote:
> What would be a good way to test the speedgains by using OPCache?
> Any ideas?

You may want to consider using a tool like ab (which comes with Apache, at
least on most Linux distros) and hitting a representative sample of pages
that you're interested in. ab provides a range of options for how many
simultaneous requests it will make, the total number of options, and so
on, and will then give you a report at the end showing best case, average,
and worst case response times.

If you do multiple runs with OPcache enabled and disabled, you should be
able to get a pretty good idea of what sort of performance improvement
you're getting.

Adam
Re: OPcache in php5.5.1 on Windows [message #182474 is a reply to message #182379] Tue, 06 August 2013 17:13 Go to previous message
Erwin Moller is currently offline  Erwin Moller
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On 8/1/2013 11:21 PM, Adam Harvey wrote:
> On Wed, 31 Jul 2013 14:50:19 +0200, Erwin Moller wrote:
>> What would be a good way to test the speedgains by using OPCache?
>> Any ideas?
>
> You may want to consider using a tool like ab (which comes with Apache, at
> least on most Linux distros) and hitting a representative sample of pages
> that you're interested in.

Thank you, Adam.

Apache Bench exists for windows (named unsurprisingly ab.exe).
I'll look into it.

Regards,
Erwin Moller



--
"That which can be asserted without evidence, can be dismissed without
evidence."
-- Christopher Hitchens
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