[Zope-DB] 2 sql methods issue (was Re: SQL Relay)

Dieter Maurer dieter at handshake.de
Wed Nov 26 15:36:38 EST 2003

Jim Abramson wrote at 2003-11-25 16:20 -0500:
 > ...
 > I've tried splitting the zope-based services we run onto two separate zope instances, on the 
 > same server, and unfortunately even in this case zope2 will not serve any requests while zope1 
 > is using more than 1 database connection actively (note - i have found that any action involving 
 > a zope db connection, not just a sql method, will cause this hogging situation).

Thus, you need to find out, what your Zope2 instance is waiting for.

I would use a ("C" level) debugger for this.

Almost surely, this would reveal that your Zope2 is waiting for
a response from your database.

In order to analyse similar problems in our Zope instance,
I added logging calls to the database adapters we use
("ZPsycopgDA" and "MySQLDA"). They log when (and what) commands
are sent to the database and when results are received.


More information about the Zope-DB mailing list