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RAM SIZE Details
Posted: Fri Nov 28, 2014 4:04 pm
by manchala
Hi
Could any body tell that how much ram size is required for Cognos TM1 9.5.2 + 2008r2 OS
Currently we are using 12 GB RAM for 64 bit server is that enough?
Thank you
Re: RAM SIZE Details
Posted: Fri Nov 28, 2014 7:02 pm
by declanr
You can run tm1 on that but whether you can run YOUR model depends enirely on your model; how much data there is, how rule heavy it is, whether you can write efficient rules and feeders, how many people will concurrently be using websheets etc.
Re: RAM SIZE Details
Posted: Fri Nov 28, 2014 10:12 pm
by lotsaram
To further what Declan said; TM1 is an in-memory database. The whole database content is loaded in RAM so how much memory you need depends entirely on how much data you have and how it is organised.
Other than that there really is no answer to your question.
Re: RAM SIZE Details
Posted: Mon Dec 01, 2014 9:44 am
by manchala
Hi
Thank you for your response.
The concurent users are 60
Re: RAM SIZE Details
Posted: Mon Dec 01, 2014 11:22 am
by lotsaram
manchala wrote:Hi
Thank you for your response.
The concurent users are 60
Brick wall .... like .... talking to.
Re: RAM SIZE Details
Posted: Mon Dec 01, 2014 12:44 pm
by TrevorGoss
Manchala,
if I were you I would set up some sort of automatic system that monitors your RAM usage for your server/servers. A system that monitors the RAM usage of each TM1 service as well as the RAM usage as a whole.
As the others have said, TM1 is an in-memory database, and if you run out of RAM suddenly, your system will be in trouble.
12GB may well be enough but checking the usage of each service will help you decide if you need more RAM or not. It will also help you find out what services are taking up more RAM and why.
Be careful with Persistant Feeders, some of them can get quite big.
Re: RAM SIZE Details
Posted: Mon Dec 01, 2014 4:08 pm
by mattgoff
TrevorGoss wrote:Be careful with Persistant Feeders, some of them can get quite big.
Why would persistent feeders affect RAM usage? In my (relatively small/new) experience with them, RAM usage is actually substantially lower since the garbage memory allocated at startup with MaximumCubeLoadThreads seems to be eliminated if a valid .feeders file is available at server start.
Matt
Re: RAM SIZE Details
Posted: Mon Dec 01, 2014 4:21 pm
by TrevorGoss
Why would persistent feeders affect RAM usage?
I was referring to the FEEDERS when loaded into memory. the .FEEDER files can give a good indication of your FEEDER usage, but you are right, the .FEEDER files themselves would not effect RAM.
In my (relatively small/new) experience with them, RAM usage is actually substantially lower since the garbage memory allocated at startup with MaximumCubeLoadThreads seems to be eliminated if a valid .feeders file is available at server start.
It is possible that this parameter is left out of someones TM1 setup. With conditional FEEDERS, it is recommended that this be the case.
Thanks for the response.
Trevor.