OACORE_SERVER Threads

We are on 12.2.5 and have 4 oacore_servers. The memory settings are: Xms2048m Xmx2048m and I am thinking about increasing it to: Xms4096m Xmx4096m but I want to make sure I do not cause a problem with memory.

In note: Applications Is Active, But Some Users Cannot Login (Doc ID 1609234.1), it says:

2. Xmx indicates max JVM heap size value, Xms indicates minimum heap size value, Xmx equals Xms, this will initial the max heap size value during every thread launching, which will lead to wasting of resources, and if many threads, that will cause no resource allocation to other threads, and leads to java.lang.OutOfMemoryError: unable to create new native thread