I am putting together new server to deal with huge burst loads of traffic. I have been reading up on performance recommendations on the site and am interested to try a battery backed up ram disks for the wal buffer. I would like to hear about types and brands of ram disk you have tried out and if anyone has a make or type they love or hate. What kind of pgbench improvements have you seen. ) Did anyone experience any linux driver issues with their ram disk? We will probably run it with Redhat (2.4.20), on an Opteron 8GB (2,4 or 8) cpu box (clients choice) with the fastest raid system we can afford. Thanks for the info.