Manual:$wgPoolCounterConf

Details
Configuration for processing pool control, for use in high-traffic wikis. An implementation is provided in ext-poolcounter>Special:MyLanguage/Extension:PoolCounter|Extension:PoolCounter.

This configuration array maps pool types to an associative array. The only defined key in the associative array is "class", which gives the class name. The remaining elements are passed through to the class as constructor parameters.