For interest: Bugzilla performance

[Gervase Markham]

As you may recall, I made some changes to the default params on the 
Bugzilla Search UI two weeks ago. Specifically, I changed:

- The default for email addresses to "is" rather than "contains", and
- The default for comments search to "contains string" rather than
   "contains all words/strings"

I get email from Bugzilla whenever a search is killed for taking too 
long. The number of these mails, while fluctuating a lot, is therefore a 
crude measure of how overloaded Bugzilla is. Here are the averages, for 
the interest of staff@ and developers at .

Pre-changes:  45.9 mails per day over 7 days
Post-changes: 16.3 mails per day over 12 days

Further performance changes, which required changes to Bugzilla's code, 
will kick in at the upgrade on November 8th.

Gerv