CLEANERS and its effect on page cleaning

The CLEANERS configuration parameter indicates the number of page-cleaner threads to run. For installations that support fewer than 20 disks, one page-cleaner thread is recommended for each disk that contains database server data. For installations that support between 20 and 100 disks, one page-cleaner thread is recommended for every two disks. For larger installations, one page-cleaner thread is recommended for every four disks.

If you increase the number of LRU queues, you must increase the number of page-cleaner threads proportionally.