ashishb888

<?xml version="1.0" encoding="UTF-8"?>

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  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
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  the License.  You may obtain a copy of the License at

ashishb888

// Find PID 
[user@host ~]$ ps -ef | grep app-name
user    14276 184778  1 11:46 pts/3    00:00:28 /host/setups/jdk1.8.0_191/bin/java -jar app-name-0.0.1-SNAPSHOT.jar

-------------------------------

// Find the list of port used for the PID
[user@host ~]$ netstat -lnp | grep 14422
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)

ashishb888

#!/bin/bash

pid=$1
appName=$2
timestamp=`date +%FT%H-%M-%S`

pidstat -w -d -t -p $pid -h 5 > /var/tmp/$appName-$timestamp.out

#bash pidstat.sh 22292 app-name &

ashishb888

#!/bin/bash

pid=$1
nohup top -Hb -p $pid > /var/tmp/top-$pid-`date +%FT%H-%M-%S`.log &

ashishb888

#!/bin/bash

nohup iostat -t 5 > /var/log/iostat-logs/iostat-`date +%FT%H-%M-%S`.log &
nohup top -u hdpusr -b > /var/log/top-logs/top-`date +%FT%H-%M-%S`.log &
nohup vmstat -t 5 > /var/log/vmstat-logs/vmstat-`date +%FT%H-%M-%S`.log &

ashishb888

#Single file.  Works well with double digits e.g. %Cpu(s): 16.5 us, 81.7 id. You may have to change -f2,10 to -f3,11 or something related

#!/bin/bash

inFile=$1
grep 'Cpu(s)' $inFile | cut -d ' ' -f2,10 | sed '/[a-z]/d' | sort -t',' -k1nr,1

# Calling the script
# bash top-cpu-usage-analysis.sh /var/tmp/cpu-stats-2020-10-01T18-16-58.log

ashishb888

#!/bin/bash

pid=$1
appName=$2
fileName=$3
delay=$4
duration=$5
timestamp=`date +%FT%H-%M-%S`

$JAVA_HOME/bin/jcmd $pid VM.unlock_commercial_features

ashishb888

import java.nio.ByteBuffer;
import java.sql.Date;
import java.sql.Timestamp;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;

public class ByteBufferUsage {

ashishb888

#!/bin/bash

timestamp=`date +%FT%H-%M-%S`
sleepMillis=10

while true
do
        top -b -o +%CPU | head -n 17 >> /var/tmp/cpu-stats-$timestamp.log
        sleep $sleepMillis
done

ashishb888

[user@abnormalhost ~]$ $JAVA_HOME/bin/jcmd 56135 JFR.start name=app_name delay=1s duration=2m filename=/var/tmp/app_name.jfr
56135:
Java Flight Recorder not enabled.

Use VM.unlock_commercial_features to enable.

[user@abnormalhost ~]$ $JAVA_HOME/bin/jcmd  56135 VM.unlock_commercial_features
56135:
Commercial Features now unlocked.