Before starting an author instance with 32GB RAM, which operation should be performed?

Before starting an author instance with 32GB RAM, which operation should be performed?

• A. Set CQ_JVM_OPTS -Xmx to 32gb
• B. Set CQ_JVM_OPTS -Xmx to 16gb
• C. Set CQ_FILE_SIZE_LIMIT to 1TB
• D. Set CQ_JVM_OPTS - XX:MaxPermSize to 16gb

Answer: (B)

Setting the maximum heap with -Xmx determines how much memory the Java VM can use for Java objects. On a machine with 32GB of RAM, reserving the full 32GB for the JVM leaves too little room for the operating system, file caches, and other processes, which can cause swapping and inefficient garbage collection. A balanced approach is to allocate about half the physical memory to the JVM, so 16GB in this scenario. This gives the author instance enough headroom for Java objects while leaving room for the OS and other overhead, helping maintain stable performance and GC behavior. The other options aren’t appropriate here: allocating 32GB to the heap is excessive and risks starving the rest of the system; the file size limit setting is unrelated to heap memory; and PermGen/Metaspace settings concern class metadata and are not the primary adjustment needed for a 32GB host in this context.

Setting the maximum heap with -Xmx determines how much memory the Java VM can use for Java objects. On a machine with 32GB of RAM, reserving the full 32GB for the JVM leaves too little room for the operating system, file caches, and other processes, which can cause swapping and inefficient garbage collection. A balanced approach is to allocate about half the physical memory to the JVM, so 16GB in this scenario. This gives the author instance enough headroom for Java objects while leaving room for the OS and other overhead, helping maintain stable performance and GC behavior.

The other options aren’t appropriate here: allocating 32GB to the heap is excessive and risks starving the rest of the system; the file size limit setting is unrelated to heap memory; and PermGen/Metaspace settings concern class metadata and are not the primary adjustment needed for a 32GB host in this context.