[Zope] Testing the performance of SQL Methods

[Thomas B. Passin]

Remember that the database engine may also do its own caching.  If you keep
asking for the same set of queries, the results may come from the database's
cache, confounding your test results.

Tom P

[Peter Bengtsson]

> I want to find the perfect caching settings on our Z SQL Methods in the
> Advanced tab, and to do this I have prepared a little script that loops
> through a bunch different setting combinations and calls different little
> methods that does the processing.
>
> Let's not worry about the settings or the data analysis for the moment.
> What I want is a stupid little function that uses a SQL method and is very
> process heavy and should use the internal caching.
>
>
> So far I have tested a few different little functions:
>
> - One that reads lines from a file, checks if the line exists, adds the
> line. (about 10 000 selects and about 10 000 insert statements)
>
> - One that reads 5 lines from a file, check if one of them, adds the new
of
> the five. More or less like the above but it waits a little bit
>
> - One that selects all records from a table 10 times per setting (10*5000
> records selected per setting)
>
>
> None of these methods have produced any useful results, except from one:
No
> correlation.
>
> The only deviations I see in process performance is depending on the
> activity of my Windows 2000. If Outlook decides to go and check for new
> mail, the particular test during that time takes a few milliseconds
longer.
>
>
> Say something that I can code that will surely use the internal caching of
Z
> SQL Methods.
> Is there a way of safely prove that Z SQL Method result caching is
actually
> being done.
>
>