[Zope] Database connections

[Martijn Pieters]

At 10:59 26/03/99 , Oleg Broytmann wrote:
>Hello.
>
>   Continuing the subject...
>   Next question. If Zope opens one connection to a database, how does Zope
>manage concurrency?
>   Currently, when two CGIs run in parallel, every CGI opens its own
>connection to the database, lock neccessary tables, and Postgres manage
>concurrency very good (even detecting deadlocks). Next Postgres version
>(6,5) will have Multi-version Concurrency Control. But all this is for
>different sessions. Zope opens only one session. Is it a problem with
>concurrency?

Zope manages concurrency by being single-threaded... so only one query at a
time, on ANY connection...

--
Martijn Pieters, Web Developer
| Antraciet http://www.antraciet.nl
| Tel: +31-35-6254545 Fax: +31-35-6254555
| mailto:mj@antraciet.nl http://www.antraciet.nl/~mj
| PGP: http://wwwkeys.nl.pgp.net:11371/pks/lookup?op=get&search=0xA8A32149
------------------------------------------