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Scaling In OpenShift -Queries



Good Day,


We are in the process of doing some research on the Auto Scaling feature with  HAProxy in OS for

an ongoing project. Hit across some issues/doubts and could not find the right documentation. It would be really helpful if you can

provide some  pointers on the same. Following are the points which needs more clarification:



1.       In the HAProxy status screen , though the status of gears are self-explanatory ,there are lot of other statistics --

·         Is there any description for  the all the statistics displayed in the screen.?

·         Can we have map the displayed  statistics to the  memory usage  to understand when the gears are allocated.

·         As mentioned in HAProxy documentation when the capacity (current sessions / total sessions )is

above 90%,a gear is added. We are not able to map this with the statistics displayed-Can you please let us know what we

should be looking at.



2.       During Auto Scaling, is a new gear allocated only if there are concurrent session(Multiple Threads).?

For ex:

There is a small auto scaled app created to rapidly consume memory .If this is run in a single thread, it hits Out Of memory Issue and gear goes down.

If this is run in multiple thread mode, auto scaling works and gears are added/removed accordingly. Is this an expected behavior.?


3.       Need confirmation on the same – As per the documentation, The algorithm for scaling up and scaling down is not configurable currently both in

OpenShift Online and OS Enterprise.Is this  deduction right ?Do we have any plans for the same in future.?


Any pointers on the same will be appreciated. We are waiting on these clarification to proceed further on ongoing asset.


Thanks In Advance

Shabna MT





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