Re: freezes with multi-threading ?

I just found out that my the script that launches my web server doesn't
launch correctly the python virtualenv that I had setup. I was using a very
old version of sqlobjects(0.10.3) and of mysqldb.

I just fixed this, and will now wait for the next freeze to happen (if it
ever happens again)...

Thanks for your great support.



On Tue, Dec 4, 2012 at 6:47 PM, Oleg Broytman <[email protected]> wrote:

> Hi! Pity to listen you have problems.
>
> On Tue, Dec 04, 2012 at 01:02:52PM +0100, Sophana K <[email protected]>
> wrote:
> > Since about one year ago (maybe more...), from time to time (about every
> > week/month), the python process completely freezes under high load.
>
>    It'd be helpful to find a version of SO that doesn't freeze.
> Unfortunately it requires to rollback your code and to run a lot of
> experiments.
>
> > Reading the code, I don't understand the call path from dbConnection to
> the
> > SqlHub.
>
>    There shouldn't be any path -- you use sqlhub as the connection:
>
> class MyClass(SQLObject):
>     _connection = sqlhub # Actually, this is the default
>
> sqlhub.threadConnection = connectionFromURI('...')
>
>    Sqlhub's __get__ and __set__ methods return the real connection.
>
> > How is the connection pool managed?
>
>    You can see the code at dbconnection.py stared at the line 332: class
> DBAPI, method getConnection. You can explicitly disable the pool by
> setting dbConnection._pool = None.
>
> > Is it thread safe?
>
>    Should be. The pool is protected by _poolLock. Does something in the
> code trigger your suspicions?
>
> Oleg.
> --
>      Oleg Broytman            http://phdru.name/            [email protected]
>            Programmers don't die, they just GOSUB without RETURN.
>
>
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