Important Openssl Commands : How to How to find OpenSSL version openssl version -a How to Create new Private Key and Certificate Signing Request openssl req -out javaperformance.csr -newkey rsa:2048 -nodes -keyout cgibell.key How to create a Self-Signed Certificate openssl req -x509 -sha256 -nodes -newkey rsa:2048 -keyout javaperformanceselfsigned.key -out javaperformancecert.pem How to verify CSR file … Continue reading Openssl Commands : SSL Certificates
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Keytool Command/Utility to generate a keystore/certificate request(CSR)
How to generate a Keystore/CSR using keytool command/utility Keytool Utility: Keytool is a key and certificate management JDK utility which helps in managing a keystore of private/public keys and associated certificates. It allows users to administer their own public/private key pairs and associated certificates for use in self-authentication (where the user authenticates himself/herself to … Continue reading Keytool Command/Utility to generate a keystore/certificate request(CSR)
JSTAT – JVM GC Performance Monitoring Tool
Monitoring Java garbage collection using jstat The jstat tool is used to displays performance statistics for an instrumented HotSpot Java virtual machine (JVM). Java memory management revolves around the garbage collector and Garbage collection is the process which is responsible to clean the heap memory and freeing space that is being taken up by unreferenced objects, … Continue reading JSTAT – JVM GC Performance Monitoring Tool
Garbage Collection in Java
Garbage Collection Process in JAVA Garbage Collection in Java automatically allocates and deallocates memory, so that developers doesn't need to write explicit program to do memory management. which is one of the main advantage of Java programming. Whenever a Java programs run on the JVM, the objects are created on the heap and is a … Continue reading Garbage Collection in Java
Tablespace Utilisation in Oracle SQL
How to Check the Table space usage in Oracle database An Oracle database consists of one or more logical storage units called TableSpaces, which collectively store all of the database's data. Each TableSpaces in an Oracle database consists of one or more files called datafiles, which are physical structures that conform to the operating … Continue reading Tablespace Utilisation in Oracle SQL
GC Time Using jstat
GARBAGE COLLECTION TIME - (using JSTAT) Login to your Linux/Unix Server Enter the below command to get the JAVA PID running on the server. ps –ef|grep –i java From the output take the application JAVA PID. Using jstat command with … Continue reading GC Time Using jstat
JBOSS CLI Operations
The following table lists management CLI operations that are available at the root level (/). The actual available operations for a particular resource will vary per resource and also depend on the operating mode (standalone server or managed domain). Operations are invoked using a colon (:). The available operations for a resource can be exposed … Continue reading JBOSS CLI Operations
Monitoring In JBOSS using CLI
CLI - Command line interface and Monitoring operations through CLI The Command Line Interface (CLI) is a command line management tool for the JBOSS EAP/AS domain or a standalone server. It acts as a command line administration tool for JBOSS. CLI allows a user to connect to the JBOSS domain controller or a standalone … Continue reading Monitoring In JBOSS using CLI
JVM Memory utilisation in linux/Unix
JVM Memory Utilisation JVM Memory utilisation in Linux/Unix server Login to your Linux/Unix Server Enter the below command to get the JAVA PID running on the server. ps –ef|grep –i java From the output take the application JAVA PID. Using below command … Continue reading JVM Memory utilisation in linux/Unix
Java Heap memory usage using jmap and jstat command
Login to your Linux/Unix Server Enter the below command to get the JAVA PID running on the server. ps –ef|grep –i java From the output take the application JAVA PID. Using jstat command with gc option to find out the JVM Heap … Continue reading Java Heap memory usage using jmap and jstat command
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