[Michael Chong]

Dear GI Experts,
I have 2 questions regarding the scalability of GI:
- First, in the startServer script, what's maximum value that we can set for TE's memory (i.e. Xmx):

set TE_NODE_OPTIONS="-XX:MaxNewSize=48m -XX:NewSize=48m -Xms256m -Xmx256m"

If we have a 8 GB memory server, can we set it to 8 GB?

- Second, is there a guideline on how many TE nodes that we can have on a single server, especially if we have a server with a lot of memory? For example, if we have a 8 GB memory server, how many TE nodes can we have on it?

[remery]

Hello Michael,

To answer your first question, you should not set you max Heap Size to 8gig. The JVM garbage collection for a heap that size will overwhelm other activity in the JVM. In our experience there is not a need for more than a 2 gig heap size. But, using a heap size over 1 gig will require GC tuning, which is dependent on your trading profile (i.e. msg/sec, payload size, etc).

You second question is difficult to answer. It depends on your hardware, and on your trading profile. The memory on the machine may or may not be the bottleneck. There could be bottlenecks in CPU, disk, network or db.. You may just want to do some testing to see where the sweet spot is in terms of max heap size, and number of te nodes. I can say that the internode communication overhead at 4 nodes starts to get very high. So I would not suggest going any higher than 4 nodes.

-Ric

Dear GI Experts,
I have 2 questions regarding the scalability of GI:
- First, in the startServer script, what's maximum value that we can set for TE's memory (i.e. Xmx):

set TE_NODE_OPTIONS="-XX:MaxNewSize=48m -XX:NewSize=48m -Xms256m -Xmx256m"

If we have a 8 GB memory server, can we set it to 8 GB?

- Second, is there a guideline on how many TE nodes that we can have on a single server, especially if we have a server with a lot of memory? For example, if we have a 8 GB memory server, how many TE nodes can we have on it?