Linux - useful commands to inspect performance utilization
Memory utilization\ 1 2 3 4 5 vmstat 1 [/cpde] Disk utilization [code lang="C"] iostat -xm 5
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Java - Recommended GC log options for Java 8 and Java 9
Java 8\ -XX:+PrintGCDetails\ -XX:+PrintReferenceGC\ -XX:+PrintTenuringDistribution\ -Xloggc:\ -XX:+PrintGCTimeStamps
Java - Garbage collectors
1. Serial\ -XX:+UseSerialGC JVM
Java - ZonedDateTime formatter for ISO-8601
Parse example\ 1 2 3 4 5 6 7 DateTimeFormatterBuilder builder = new DateTimeFormatterBuilder(); DateTimeFormatter formatter = builder .parseCaseInsen...
Java - heap dump utilities
Heap histogram\ 1 jmap -histo [pid]