OFBIZ DEPLOY MEMORY PROBLEM

Hi, I deploy Ofbiz on a linux server have 4GB RAM. I test with 2 user access to ecommerce site. My memory used continuous increase. i config in build.gradle def jvmArguments = ['-Xms512M', '-XX:MetaspaceSize=128m', '-XX:MaxMetaspaceSize=256m', '-XX:MaxHeapFreeRatio=75',

Issue at render "nextPrev" macro when lookup category at create order

Hi, I have a problem at render pagination when lookup category at create a order. renderNextPrev macro throw "The following has evaluated to null or missing" exception. But i donn't know where is null. Everybody have this problem or understant about renderNextPrev macro please help me. thank