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Question by Avner S. · Jan 29, 2015 at 07:14 PM ·

Improve CAS Cluster Performance

I would like to know if someone has some documentation about how to improve the performance of CAS when working with Cluster Farm.

I already did some configurations like increase the value "DMI_AGGR_ROWS_TO_SEND" and I also know that is possible to increase performance enabling the cluster to work with cache (more details https://community.compuwareapm.com/community/display/DCRUM122/Enabling+DMI+Cache+Support+in+Server+Clusters).

Besides that, are there any best practices to follow that will improve the performance of CAS Cluster?

PS: I know that my performance is poor because the DMI Application Health Status takes more than 20 seconds to load on the CAS Master when it is aggregating data, but if I select to see data only from one of the Slave CAS'es, the DMI loads in about 2 seconds.

 

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Answer by Avner S. · Feb 09, 2015 at 05:15 PM

Adam, I was searching and I found the configuration "DELTA_THREADS" in the common.properties file. 

Searching in the community, I found that this configuration is the number of threads that the Delta user is able to execute in the database, correct?
So, if I increase this default value, and my database is good enough to handle with more threads from this user, will I increase in performance, once I will be able to get more data with more connections in a shorter period of time?

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Answer by Adam P. · Jan 30, 2015 at 08:03 PM

The only thing has left is going to 12.3 for Report Server Load Balancing ...

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avatar image Avner S. · Feb 02, 2015 at 09:55 PM 0
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Thanks for the reply Adam.

Just one more question, there is a limit to increase the value "DMI_AGGR_ROWS_TO_SEND" or it depends of each environment?

I searched about it, but I haven't found any "warning" about it.

Thanks!

avatar image Adam P. ♦♦ Avner S. · Feb 02, 2015 at 10:09 PM 1
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Increasing this params specifies how much data can be transferred from one CAS to another in a Farm. It was designed to preserve CASes performance and not allow them (or rather users) to transfer to much.

So increasing would be rather a response to not receiving all desired huge set of data but decreasing would rather speed up the farm ...

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