If you are running LISTSERV on a 3090 under VM/XA SP2, and you have expanded storage for minidisk cache, and make sure you reformat LISTSERV's 191 to be 4K. The reccomendations with I first installed it many moons ago said to use 1K because of the number of small files. I noticed last night that it was still 1K, and I reformatted it this morning. ADDs to NETMONTH(granted, a LARGE list) previously were taking about 10 seconds, now complete in less than 1. Talk about a difference. /ahw