nginx eating all RAM, log files?

Richard Kearsley rkearsley at
Mon Apr 22 19:32:31 UTC 2013

Are you sure it's not the linux file/buffer cache that's using all your 
ram? (does ps/top show nginx or the worker processes using it directly?)
Linux and most/all other unix variants will fill up unused ram with 
cached versions of the most recently used files so they don't have to be 
read from disk each time... it's completely normal and expected behaviour :)

On 22/04/13 19:30, Joseph Cabezas wrote:
> I have two nginx instances (nginx/1.0.15) on a 4GB RAM machine. Each 
> instance runs fewer than 25 requests as reported with stub_status on;
> The problem is that once nginx is started from scratch it starts 
> eating (or reserving?) RAM progressively as reported by free -m, up to 
> the point where it leaves only 2-5mb left and then it doesnt go past 
> that. In about 7 days it has eating everything. Nginx doesnt crash, 
> nor does it touch swap but I definately feel it compromises system 
> resources to the point iam concerned as in a production spike its wise 
> to think the server has no room.
> This is the exact same issue on 4 other nginx machines I have.
> In order to start over again I must kill -QUIT the PIDs , delete the 
> log file (which is smaller then 800mb) and then all goes back to the 
> cycle.
> Please indicate me what pieces of information I can supply to debug 
> this issue.
> Thanks
> Joseph
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> nginx at

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