Control process concurrency in PHP

Posted by Ivan on Stack Overflow See other posts from Stack Overflow or by Ivan
Published on 2010-05-27T18:37:42Z Indexed on 2010/05/27 18:41 UTC
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Filed under:

php

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mysql

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concurrency

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multiprocess

I have programmed a simple app that every X minutes checks if an image has changed in several websites and downloads it. It's very simple: downloads image header, make some CRC checks, downloads the file, stores in a MySQL database some data about each image and process next item...

This process takes about 1 minute to complete.

The problem is I have noticed that while the server is executing this process I cannot access to any page in the website, even those that don't require MySQL.

I don't know why it is happening and I have no clue about how to fix it. Perhaps a more advanced PHP programmer can help me.

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