[ZODB-Dev] ZEO's stats.py and simul.py

[Chris Withers]

Hi there,

Does anyone know if the stats.py and simul.py that ship in Zope 2.7.2's 
ZEO package are up to date?

I turned on cache tracing and tried to analyze the resulting logs using 
these two tools.

stats.py told me I had a 98% hit rate, while 
http://www.zope.org/Wikis/ZODB/HowtoTraceZEOCache/trace.html says the 
theoretical maximum is 90%.

simul.py barfed out on the same log file

Traceback (most recent call last):
   File "C:\zope\2.7.2\lib\python\ZEO\simul.py", line 758, in ?
     sys.exit(main())
   File "C:\zope\2.7.2\lib\python\ZEO\simul.py", line 132, in main
     sim.event(ts, dlen, version, code, current, oid, serial)
   File "C:\zope\2.7.2\lib\python\ZEO\simul.py", line 198, in event
     self.report()
   File "C:\zope\2.7.2\lib\python\ZEO\simul.py", line 228, in report
     print self.format % (
ValueError: unconvertible time

In any case, what's the best way to determine how large the 
ClientStorage cache_size should be set?

Are there any penalties for setting it too large?

cheers,

Chris

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