[ZODB-Dev] Cache Query (why doesn't RAM usage ever drop?)

[Jeremy Hylton]

>>>>> "SH" == Shane Hathaway <shane@zope.com> writes:

  SH> ExtensionClass does not use PyMalloc.  I wonder if it would be
  SH> worth the effort to change it.  (To the group) Does Python
  SH> itself use PyMalloc?

Python 2.2 and up uses pymalloc (or is its right name obmalloc?).  But
pymalloc never returns memory to the system.  As a rule, I'd say its
practically impossible to control when memory is returned to the
system.

Does any have evidence of harmful effects caused by large process
size?  After a balloon event (memory balloons to a large size and then
deflates when the transaction commits), most of the pages aren't
touched so the working set size is smaller.

Jeremy