NYCPHP Meetup

[Konstantin Rozinov]

In one of the slides, it says Facebook uses around 640,000 user
objects/variables to and from their APC cache.

Anyone have any ideas why so many variables?  With over 200 million
users I would think 640k would be too few if the objects pertained to
individual users...

Konstantin


On 3/31/09, Konstantin Rozinov <krozinov at gmail.com> wrote:
> Thanks for the tips Che and Tom.  I will try the debugging tools to
> see where the bottlenecks are.  I've got apc.stat set to 0, but the
> largest # of includes in the application is only about 8 in some
> files, so I wouldn't expect it to make that much of difference, but
> every little bit counts :)
>
> I found these presentations, which have some good pointers, but lack a
> lot of details.  Sample code or pseudo-code would've been nice to see:
> http://tekrat.com/talks_files/openweb2008/apc@facebook.pdf
> http://www.scribd.com/doc/4069180/Caching-Performance-Lessons-from-Facebook
>
> Konstantin
>
>
>
>
> On Tue, Mar 31, 2009 at 12:49 AM, Tom Melendez <tom at supertom.com> wrote:
>>> 4. Any links to really good APC howtos or tutorials would be greatly
>>> appreciated!
>>>
>>
>> Not at all what you asked, but....
>>
>> If you're using absolute paths in your require/include files and you
>> turn this off you should see gains:
>>
>> http://us.php.net/manual/en/apc.configuration.php#ini.apc.stat
>>
>> In setting it to zero, you tell it not to stat the file.  If you are
>> using some beefy framework with lots of includes this can be a big
>> win.
>>
>> Leave it set to 1 for development though.
>>
>> Thanks,
>>
>> Tom
>> http://www.liphp.org
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>