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Asked: 2026-05-31T00:15:54+00:00

My PHP memory_limit is 64M (which is pretty high to start with) I have

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My PHP memory_limit is 64M (which is pretty high to start with)

I have a MongoCollection::findOne() called in my PHP code where I “find one” by MongoId.
It works in most cases. However in some cases, it causes PHP to go over the memory_limit of 64M.

The data record in Mongo is at max, 3.5MB because Mongo does not allow more than 4MB.

When I run, memory_get_usage() before calling findOne(), its only about 4MB. So findOne() seems to have consumed the other 60MB+. Is this a memory leak or is there a design flaw in the way I store in Mongo?

My PHP Mongo driver is the latest 1.26

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  1. Editorial Team

    It would be helpful if you could post the exact code that you are running. It is most likely your code, but there is a chance that it could be a bug with the Mongo PHP drivers. The latest version of the drivers (1.2.9) seems to be a step backwards from previous versions. I myself found a bug in the driver that causes php to segfault on connection timeouts 😮 In a conversation that I had with a 10gen developer it was revealed to me that the php drivers are the least mature of all the languages, but I was told that they just hired a php developer so the drivers should be getting some love soon.

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