Torsten Förtsch

NAME

Apache::DBI::Cache::mysql - a Apache::DBI::Cache plugin

SYNOPSIS

  use Apache::DBI::Cache plugin=>'Apache::DBI::Cache::mysql',
                         ...;
 or

  use Apache::DBI::Cache;
  use Apache::DBI::Cache::mysql;

DESCRIPTION

NOTE: Read Apache::DBI::Cache before.

DBD::mysql allows many different DSN syntaxes for connecting to the same database server and the same database. This plugin transforms them to a standard format thus allowing better DBI handle caching. Further, if port is omitted the standard port 3306 is inserted. The actual database is deleted from the DSN and replaced by a USE database command.

So, DBI connects to the following DSNs as the same user at different times are actually performed with the same DSN host=server;port=3306. Subsequently USE db[1-3] commands are issued before passing the handle to the caller.

  dbi:mysql:dbname=db1;host=server
  dbi:mysql:db2:server:3306
  dbi:mysql:port=3306;database=db3;host=server

Apache::DBI::Cache can cache them all under the same key. So only one real database connection is needed instead of 3 without the plugin.

Furthermore, mysql_auto_reconnect is turned off.

SEE ALSO

Apache::DBI::Cache

AUTHOR

Torsten Foertsch, <torsten.foertsch@gmx.net>

With suggestions from

Andreas Nolte < andreas dot nolte at bertelsmann dot de >

Dietmar Hanisch < dietmar dot hanisch at bertelsmann dot de > and

Ewald Hinrichs < ewald dot hinrichs at bertelsmann dot de >

SPONSORING

Sincere thanks to Arvato Direct Services (http://www.arvato.com/) for sponsoring this module and providing a test platform with several thousand DBI connections.

COPYRIGHT AND LICENSE

Copyright (C) 2005 by Torsten Foertsch

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.