find PHPStorm settings folder and edit .vmoptions
-server
-Xms2048m
-Xmx4096m
-XX:MaxPermSize=350m
-XX:ReservedCodeCacheSize=256m
-XX:+UseConcMarkSweepGC
-XX:+UseParNewGC
-XX:SoftRefLRUPolicyMSPerMB=50
-XX:+CMSParallelRemarkEnabled
-XX:ConcGCThreads=4
-XX:+TieredCompilation
-XX:+UseCompressedOops
-XX:+HeapDumpOnOutOfMemoryError
-ea
-Dsun.io.useCanonCaches=false
-Djava.net.preferIPv4Stack=true
where:
- Xmx - max memory PHPStorm can use