keywords so I can find this later: max number of filesystem handles under a single oracle.exe process win32 w2k win32: w2k adv svr sp4 Oracle 9.2.0.5 EE + partitioning (might go 10.1.0.2 soon) What is the largest number of user sessions * datafiles = filesystem handles that you've encountered in win32 land? I had the bright idea of partitioning several large tables at a client site that are frequently hit, that typically supports 250 simultaneous sessions. Normally, most users will only actively hit the most recent partition for those tables and their indexes, but I am somewhat concerned that if we managed to hit say 10,000 handles that I could be in for quite a surprise. That evaluation server went back to the manufacturer prior to me getting to test destructively (the fun part). I'm currently seeing around 6000 handles for 225 threads in a non-partitioned setup for a single oracle.exe process. currently using 2 tablespaces for data (128KB and 8 MB extents, unform LMTs) 2 tablespaces for indexes (128 KB and 2 MB extents) with 8 datafiles each, as there are 4 RAID 10 mount points and been chunking them in 1 GB files. I'm aware of the parameter session_max_open_files and will have to bump it up. I did experience an episode of resource exhaustion when a mail server was down, and the mail proc was opening up handles repeatedly (by the thousands) which caused the instance to not be able to create any dedicated server processes - where I think it hit 15,000 handles. that was quite awhile ago and I did not save the debugging info. To sum it up, If I partition 42 tables into 42 partitions (months) that each have 42 indexes and 42 users simultaneously access the application, will it throw an ora-00942 error? :) thanks in advance. Paul ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------