Maximo

I currently have 100 users in our Maximo install, 7.5, and I need to add another 50. I was warned that it might cause performance issues when they newest 50 start using Maximo. I have 3 Microsoft Windows database servers running Oracle 11g Enterprise with two of them loaded with WebSphere application servers. Your guidance on organizing hardware versus software setup is really helpful. I’m having a hard time believing 150 users will cause an issue. 

So, with that in mind, how are you configuring/ setting up your Maximo install? More specifically, how many servers, database vendor etc? 

Blake McDonald

It is a difficult question to give advice for unless you provide more details about your server specs, Maximo modules used, and how concurrent usage will change if any. You are adding 50 more users above your current 100. How are the 100 users currently using Maximo? What modules? How will the other 50 use Maximo? I think you need to look at how concurrent usage will change if any by adding the 50 users. For example, if the 50 additional users are from a different time zone, the system load may be distributed across the 24 hours that may not matter much. Or, there could be an impact requiring additional system resources. There could be greater load on Maximo servers, or there could be conflict with IT needs such as network backups. 

To give you an example of what we use:

we go by a ratio of 20 users per JVM and only 2 JVM's per server instance.  we have only seen a concurrent user peak at 104 users, which was under our capability expectations of 3 UI Servers (6 JVM's) and 1 CRON Server (1 JVM)

hi,

you may setup your JVM following:

20 current users per UI JVM

1 Cron JVM

10 current  users per Report JVM

To add more memory of Oracle PGA

I wouldn't run the DB and App Servers on the same boxes / VMs.  Keep them seperate.

For 150 Concurrent Users in 7.5 you *should* be able to get away with 3 UI App Servers, 1 Cron / MIF App Server (Depending on how many Crons / Escalations you have running and MIF traffic you have ) And potentailly a single Reporting Server.

Have 2 DB servers in an active/passive cluster ( you can than point your Reporting Server at the Passive DB Server ).

As folks have alluded to I would look at using performance simulation tools i.e Rational Performance Tester / HP Load Runner to simulate as best as possible what your Production enviroment is doing day to day.  In order to tune before production deployment, make sure you have strict (as possible) metrics in mind that you want to hit (i.e it should take no longer than x seconds to change the Status of a Work Order), else you end up in tuning hell that will never end (users will always want the system to run faster!)

Then look at analyising Oracle AWRs to tune the Oracle memory settings, look for long running SQL qurieies etc.

Also look at analysing the App Server GC logs and Maximo logs to look for any issues.

Use this document to help:

https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/IBM+Maximo+Asset+Management/page/Best+practices+for+performance

Any questions feel free to shout.