Re: repos corruption revisited: memory leak?

Ben Collins-Sussman wrote:

> When I fire up my httpd on Linux, I get about 8 mpm-prefork children,
> each about 3 megs in size. After even the most gigantic svn
> operations, the largest child never grows bigger than 10 megs.

But he's running Apache under Windows, which is a very different beast from
Linux. I don't run Apache under Windows, so perhaps someone who does could see
how much memory the child processes typically use.

And I am also pointing out that Windows doesn't behave well under low memory
conditions (and I would consider 128MB to be very low memory for a Windows
server). If he is running a browser and editor, etc. on the machine, he could
quickly exhaust physical RAM. For example, just this moment, Mozilla 1.4 is
consuming ~60MB and a Macromedia flash player app is taking 16MB on top of that.

>
> How could this be a problem with swap? He's saying that child httpd
> processes are growing up to 80 megs and beyond. Are you suggesting
> that if his machine had a gig of RAM, that his httpd processes
> *wouldn't* grow to 80 megs and beyond?

No, he didn't say that:

> memory consumption was low: RAM usage did not go above
> 80MB, pagefile not above 220 MB.
>

That't not the individual child processes, that is total RAM consumption by
_all_ processes. He also didn't identify what other processes were running the
day before he had his problems. I am also concerned that he is using
hibernation with resident server processes.

I don't know for sure, but I think it would be best to add RAM as a first pass.
If and until someone else can replicate this, his specific environment is a more
important clue that the software he is running, IMNSHO.

John

-- 
John Peacock
Director of Information Research and Technology
Rowman & Littlefield Publishing Group
4501 Forbes Boulevard
Suite H
Lanham, MD  20706
301-459-3366 x.5010
fax 301-429-5748
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