[Mimedefang] Embedded Perl (continued)

[Steffen Kaiser]

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On Tue, 22 Sep 2015, Amit Gupta wrote:

> My situation is that the number of mimedefang.pl processes jumps to
> about 70 during peak loads (we are processing a couple hundres
> messages per minute on average).  Our filter file is in need of some
> optimizations(since each mimedefang.pl is taking about 125mb of
                                                    ^^^^^^^

> resident memory), but I'm wondering if using embedded perl will help
> in this situation.  I see you mentioned using embedded perl prevents
> forking entire processes.. So does this mean each request is handled
> by a thread within the main process instead?  So would my RAM
> requirements be reduced drastically?

Read Dianne's response about the garbage collector. Unless the script use 
very view different values of your loaded data or use weak references, you 
will not notice any reduction in long run.

I had SpamAssassin rules allocating about 100MB, the forked children only 
shared the C libraries after some time. That's a problem of Perl's way to 
handle rereferences to data.


- -- 
Steffen Kaiser
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