Author:
erics, June 17th, 2019
Latency-sensitive applications running in Java sometimes experience unacceptable delays under heavy I/O load. This blog discusses why this problem occurs and what to do about it for applications running Tungsten Clustering for MySQL.
Categories: Cluster, Heavy I/O Load, I/O, Java GC, JVM, Manager, Mastering Tungsten Clustering Tags: Clustering, Java, mysql, Speed, Tungsten
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Comments Off on Why is My Java Application Freezing Under Heavy I/O Load?
Author:
erics, March 28th, 2013
https://help.ubuntu.com/community/EC2APITools https://help.ubuntu.com/community/Repositories/CommandLine#Adding_the_Universe_and_Multiverse_Repositories As root in /root: vim /etc/apt/sources.list ## Added to the bottom: deb http://us.archive.ubuntu.com/ubuntu/ hardy multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ hardy multiverse deb http://us.archive.ubuntu.com/ubuntu/ hardy-updates multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ hardy-updates multiverse apt-get update apt-get install sun-java5-jre apt-get install unzip wget http://s3.amazonaws.com/ec2-downloads/ec2-api-tools-1.3-34128.zip unzip ec2-api-tools-1.3-34128.zip export EC2_HOME=/root/ec2-api-tools-1.3-34128 export PATH=$PATH:$EC2_HOME/bin mkdir .pem Copy downloaded X.509 private key and cert into […]
Categories: How-To's, Technology Tags: AWS, cert, EC2, Export, Hardy, Java, Multiverse, private key, RDS, Ubuntu
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Author:
erics, November 1st, 2011
Download the program from SourceForge: http://jperfmeter.sourceforge.net/
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cd mkdir jperfmeter cd jperfmeter unzip jperfmeter-1.4.0.zip |
Here is how I invoke jperfmeter using a shell script called perfmon: perfmon script
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#!/bin/sh # perfmon - calls jperfmeter (cd ~/jperfmeter; ./jperf 2>&1) > /dev/null 2>&1 & |
HINT: rpc.rstatd and jPerfmeter communicate using RPC via UDP – be sure to open your firewall to allow this.
Categories: How-To's, Technology Tags: howto, Java, jPerfmeter, Perfmeter, Perfmon, rpc.rstatd, rpcbind, rstatd, statd, tips
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Author:
erics, January 8th, 2011
Install the latest Sun version of the JDK and set $JAVA_HOME to it. # wget -O jdk-6u23-linux-i586-rpm.bin ‘http://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/VerifyItem-Start/jdk-6u23-linux-i586-rpm.bin?BundledLineItemUUID=6vKJ_hCvsgsAAAEtIlQpGGh0&OrderID=oFmJ_hCvw1AAAAEtFVQpGGh0&ProductID=QhOJ_hCw.dUAAAEsFIMcKluK&FileName=/jdk-6u23-linux-i586-rpm.bin’ # sh ./jdk-6u23-linux-i586-rpm.bin # export JAVA_HOME=/usr/java/latest
Categories: How-To's, Technology Tags: howto, Java, JDK, Sun, tips, trustAnchors
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