go to post Ron Mitchell · Jul 7, 2022 We haven't had a MSM/UNIX system here for quite a while, so I can't verify these settings for a UNIX system. We do still have one legacy MSM v4.4.1/Windows system running. I did some testing many years ago on these settings in Windows and here's what I found: Stack: 64K STAP: 64K Partition: 256 Buffer Pool: 262144 I don't think I changed any of the other parameters you mentioned. As far as the Buffer Pool, I worked up to this number, but you may not want or need this many. I found that anything over this resulted in diminishing returns, as it apparently took more time to look thru the Buffer Table than was being saved by having a larger number. Your mileage may vary, so I'd try doubling whatever you now have and continue to do that until the system is stable. Up to a point, more Buffers definitely helps disk performance. These parameters are also dependent on the 4GB of memory in our server. Ron 0 0 https://community.intersystems.com/post/help-doubts-msm-mumps-unix-0#comment-194411 Certifications & Credly badges:Ron has no Certifications & Credly badges yet.Global Masters badges:Ron has no Global Masters badges yet.Followers:Ron has no followers yet.Following:Ron has not followed anybody yet.