PHP Mongo Extention

[Tomasz R.]

Hi,

I'm using php Mongo Extention, and I'm trying to test it a bit.

I've setup a simple test script, that does a find and update on some
data I preloaded.
Everything goes well, till I hit about 25K of requests (concurrency of
10).
Then php starts throwing:

MongoConnectionException: : Cannot assign requested address in
<filepath> <linenumer>

Everything becomes extra slow, and does not recover until requests do
not stop. Any idea what's going on ?

Thanks

[Kristina Chodorow]

I think this error is caused by running out of ports > 1023, so it's trying to bind to one of the superuser ports.  

The driver should close a connection when the Mongo instance goes out of scope... is it possible that your program isn't allowing certain connections or cursors to go out of scope?  

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[Tomasz R.]

Just in case, I've closed my Mongo object using close()
That did not help. I keep hitting the bottleneck at around 24k

Are there any configs in mongoDB/PHP Mongo Extention that I should
check before doing any sort of stress test ?

I'm holding only ~15 small documents in MongoDB so the database is
small.

Do you know of a way that would allow me to watch my free ports while
running stress test? I'm on linux...

Thanks.

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[Kristina Chodorow]

It's possible that you're running into a mutex bug that was in 1.0.4... could you try the latest code at http://github.com/mongodb/mongo-php-driver ?

"netstat -t" lets you see what ports are being used.

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[Tomasz R.]

Just FYI,

I've found the reason for my troubles. It looks like I was running
under high traffic, and my connections were not set to persist.

I switched to persistent connections

---------------
$connection = new Mongo('mongodb://localhost', array('persist' =>
'php'));
---------------

and that solved I my issues.

Thanks.