* Ramashish Baranwal wrote on Tue, Oct 30, 2007 at 15:06 +0530:
> > The heap size will never be reduced again regardless of the
> > amount of "free()" calls, the memory can however be reused.
> > Therefore, if your application at one point in time needs a
> > lot of heap space the memory consumption shown may be higher.
>
> I am monitoring the memory usage for the process by using top
> command in Linux.
> The difference is almost an order of magnitude (few hundred MBs
> vs. around 2 GB). Is openssl using some kind of memory caching
> for its ssl handshake which is not getting released when the
> handshake is over?
If I understood correctly Lutz said that the memory usage
displayed by top is not neccesarily the current memory usage but
the highest peak memory usage. It might be the case that only 100
MB of those 2 GB are currently used.
I think, having a big peak may not be very surprising when
attempting to create heaps of connections at the same time
(meaning that probably a lot of temporary memory is used
concurrently, maybe some certificate structures for each
connection and so on) in contrast to sequential connections
(where that temporary memory also appears sequentially and can
reuse pages allocated from the system). If I calculated correctly
(2 GB for 4000?) that would be 524 KB per connection, no idea if
this is a reasonable value or too much.
(hope I didn't got it too wrong, its guessed :))
oki,
Steffen
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