jps-monitor

jps-monitor.sh

#!/bin/sh

# Make periodic snapshots of running java processes.
#
#   ./jps-monitor.sh jmap -heap
#   ./jps-monitor.sh jmap -heap %s # PID of monitored process will be used for %s

target="jps-monitor/"
rm -rf $target
mkdir -p $target

cmd_pattern="$@"

while true; do
    jps -lmvV | while read line ; do
        # Skip jps itself
        if grep -q sun.tools.jps.Jps <<< "$line"; then
            continue;
        fi

        # Start logging new process
        pid=`cut -d ' ' -f 1 <<< "$line"`
        log="$target/$pid"
        if [ ! -f $log ]; then
            printf "$line\n" > $log
        fi

        cmd=`printf "$cmd_pattern" $pid`
        if [ "$cmd" = "$cmd_pattern" ]; then
            cmd="$cmd_pattern $pid"
        fi

        echo >> $log
        date --rfc-3339=ns >> $log
        $cmd >> $log 2>&1

        sleep 1
    done
done