pgCluu is a program that performs a full audit of a PostgreSQL cluster's performance new
Load balancing multithreaded PostgreSQL connection pool. Also has a replication mode to keep in sync the load balanced backend servers. Needs the ACE framework libraries.
A modular, simple, and quick database benchmarking tool. It relies on interchangable shared objects to connect to and communicate with the backend database.
fsdb speeds up the creation of slocate's database files by tracking which directories change and therefore performs much less work when updating the database. Updates are about 60 times faster than updatedb.
mysqlstress is a small but powerful program in that it allows an administrator to stress a MySQL server to check performance.
Oracle Session Manager
An X11 program to monitor sessions on the database, what they are doing, and what kind of resources they are consuming.
OSDL Database Test Suite
The OSDL Database Test Suite aims to create database workload test kits used to simulate heavy user loads for OLTP, Decision Support, and e-commerce database transactions. These test kits can also be used to gather performance results for Linux.
SQL Load Balancer PHP module
It is a set of deamon programs that make multiple permanent connection to one or more database when they start. Then an external program, previously linked with the sqlb client library, can send SQL requests to these deamons and get the result without any need to make a connection/disconnection.