Your JVM doesn't have enough free space allocated to code caching. This could be causing performance issues
Parameter were set in /confluence/bin/setenv.sh - Confluence was restarted, but no effect. Error message is still there
CATALINA_OPTS="-XX:ReservedCodeCacheSize=696m -XX:+UseCodeCacheFlushing ${CATALINA_OPTS}"
Confluence 6.6.1