Confluence memory consumption slowly increasing - well above -Xmx spec

[Marcus Kesper]

Our Confluence process is started with -Xmx4048m setting but actual memory consumption according to top is 5.8GB:

KiB Mem: 8199296 total, 7985528 used, 213768 free, 61360 buffers
KiB Swap: 0 total, 0 used, 0 free, 140896 cached

PID  USER     PR NI VIRT  RES  SHR  S %CPU %MEM TIME+     COMMAND
2837 confluen 20 0  7651m 5.8g 25m  S 74   73.9 92090:48  java
3258 mysql    20 0  1063m 634m 3756 S 6     7.9 1554:31   mysqld
4041 confluen 20 0  2767m 900m 4576 S 0    11.2 503:38.02 java

Together with Synchrony and MySQL we'll soon reach 100% memory (8GB). According to Confluence System Information, only about 2.5GB of 4GB allocated memory is used. What are the recommendations in such a case? Reduce -Xmx or increase server memory?

[Roman Kirilenko]

It's actually OK that java machine consumes more memory than specified in -Xmx setting. You have to choose between increasing server memory and decreasing the heap size based on your server load and your instance size.