Hi Ahmed,

From the new log it is clear that the GC behaves much better.
However I found a couple of cases where we have a GC pause of a few seconds (for example at 11:57:05,996 and at 14:57:11,976).
These pauses are smaller than the connection timeout of clients and therefore have been harmless.

Since the JVM have to handle with a quite large heap, you will always have a potential risk using the default GC configuration.
What triggers the issue is hard to say, it does not seem the server load since it seems that for the Jan 13 the load was greater than Jan 12, do you confirm?
But you should also consider the general state of the macchine apart Lightstreamer JVM process.

But ultimately configuring the GC with the recommended settings you should shirk the issue.

Regards,
Giuseppe