Re: [OT] MySQL is bad, but THIS bad?
Florian Weimer <fw@deneb.enyo.de>
From: Florian Weimer <fw@deneb.enyo.de>
To: "Mark Woodward" <pgsql@mohawksoft.com>
Cc: pgsql-hackers@postgresql.org
Date: 2006-05-18T05:18:53Z
Lists: pgsql-hackers
* Mark Woodward: > "On the other hand, you shouldn't use mysql_use_result() if you are doing > a lot of processing for each row on the client side, or if the output is > sent to a screen on which the user may type a ^S (stop scroll). This ties > up the server and prevent other threads from updating any tables from > which the data is being fetched." > > How do busy web sites work like this? Any system based on locking exhibits this problem. Even with MVCC, you can run into it if you've got multiple writers. As a rule of thumb, I never perform network I/O within transactions which update the database (or "read the database", for systems without MVCC).