Apache::DBI::Cache - a DBI connection cache - search.cpan.org
http://search.cpan.org/~opi/Apache-DBI-Cache-0.08/lib/Apache/DBI/Cache.pod#logger yet another module that does connection caching
http://search.cpan.org/~opi/Apache-DBI-Cache-0.08/lib/Apache/DBI/Cache.pod#logger yet another module that does connection caching
http://search.cpan.org/~timb/DBI-1.602/lib/DBI/ProfileDumper/Apache.pm#Memory_usage DBI profiling module for mod_perl
http://perl.apache.org/docs/1.0/guide/performance.html#Persistent_DB_Connections some mod_perl performance notes, including persistent connection handling
http://www.saturn5.com/~jwb/dbi-examples.html how to use perl DBI interface
http://odyssi.blogspot.com/2007/07/postgresql-replication-pgcluster.html some notes about PG cluster
http://www.postgres-r.org/documentation/terms replication terminology
http://www.ibm.com/developerworks/db2/library/techarticle/dm-0611chang/ 2PC stages
http://people.planetpostgresql.org/greg/index.php?/archives/122-DBDPg-2.0.0-released.html a lot of useful bugs fixed
http://sql.ru/forum/actualthread.aspx?tid=211296 netsted sets (trees) in postgresql
http://www.samag.ru/cgi-bin/go.pl?q=articles;n=07.2007;a=02 from Russian SysAdmin magazine