Folks,
Nate and I spent a lot of time -- frankly, far too much time --
chasing this down a few months back. We ended up completely re-
writing the multi-threaded allocator with features to reclaim memory,
fix stats counters which in the current code are broken and lie, and
added an "alloc" command with all sorts of fun introspection
features, and some monitoring adp pages. Nate will post it for folks
to try if interested -- consider it interesting but experimental :)
-Jim
On Jun 2, 2006, at 2:37 PM, Guan Yang wrote:
Thanks,
What values would you suggest for NBUCKETS and MAXALLOC?
And looking at tclThreadAlloc.c, I'm not quite sure how to make the
spacing closer.
Guan
On 2 Jun 2006, at 19:28 , Jeff Rogers wrote:
I think one difference is in the tcl version itself; the latest
versions use a fast multithreaded allocator that allocates on
average slightly more than double the amount requestes, while
earlier versions may have been more frugal. You can cut your
memory usage by a third or more by increasing the number of
buckets defined in tclThreadAlloc.c and making the spacing closer;
there will be a bit more constant overhead and the allocator would
run microscopically slower. You may also want to look into the
ttrace module which makes all the tcl interpreters lazily load
their code instead of loading everything up front which can be a
significant savings but I have had very little luck with it (I
think the openacs code does too many fancy things to work well
with it).
-J
Guan Yang wrote:
Hi,
A couple of weeks ago I moved a number of servers to AOLserver
4.0.10 from various versions of 3.4 because of the 10^9 seconds
problem. After the move servers that were preivously using
100-120 MB of memory are now using around 300 MB to 400 MB each.
I've tried to turn off or reduce adp and fastpath caches,
reducing maxthreds to the 40's level. Stacksize is 500k. We have
used more or less the same config files, with a few changes like
the new nsopenssl configuration format.
Has anyone else had experiences with memory usage after switching
to AOLserver 4.0, and is there any easy way to reduce it?
Thanks,
Guan
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