Log File rotation in AEM/CQ5

Statement: JVM Log file rotation parameters
Solution:
Add the below parameters in the start.bat/start.sh file of AEM:

• XX:+HeapDumpOnOutOfMemoryError — Write an heapdump if the JVM runs out of heap space
• XX:+HeapDumpOnCtrlBreak — On windows create an heapdump when pressing ctrl+break
• verbose:gc — Verbose garbage collection logging
• XX:+PrintGCTimeStamps — Print timestamps in the GC log
• XX:+PrintGCDetails — Even more GC information
• Xloggc:gc.log — Write the GC logs to this file and not to stdout
• XX:+UseGCLogFileRoatation — Enable GC log rotation
• XX:+NumberOfGCLogFiles=10 —Keep 10 versions of that GC log file

JVM Parameter	Description
§  verbose:gc	§  verbose garbage collection logging
§  XX:+PrintGCTimeStamps	§  print timestamps in the GC log
§  XX:+PrintGCDetails	§  even more GC information
§  Xloggc:gc.log	§  write the GC logs to this file and not to stdout
§  XX:+UseGCLogFileRoatation	§  (since Java 6u32 or Java 7u2) — enable GC log rotation
§  XX:+NumberOfGCLogFiles=10	§  (since Java 6u32 or Java 7u2) — and keep 10 versions of that GC log file

Logfile rotation related findings

Finding ID	Title	Total Risk	Effort to fix
LR1	verbose:gc	Medium	Low
LR2	XX:+PrintGCTimeStamps	Medium	Low
LR3	XX:+PrintGCDetails	Medium	Low
LR4	Xloggc:gc.log	Medium	Low
LR5	XX:+UseGCLogFileRoatation	Medium	Low
LR6	XX:+NumberOfGCLogFiles=10	Medium	Low