Tag Archives: RHEL

RHEL / OpenJDK – Performance Tuning

January 8, 2013

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This post highlights three performance tuning techniques for Red Hat Enterprise Linux (6.2) and OpenJDK (1.6): TCP send / receive windows, large page memory, and i-CMS.

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Concurrent, High Throughput Performance Testing with JMeter

July 31, 2012

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This post highlights a few tips that may be necessary to identify the maximum concurrent throughput of one or more application servers with JMeter. They include TCP / IP tuning, load balancer tuning, and garbage collection tuning.

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Know your ulimits.

July 27, 2012

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When running Apache HTTP Server 2.2 and / or JBoss Enterprise Application Platform (EAP) 6 on Red Hat Enterprise Linux (RHEL) 6 with a high number of concurrent connections, the user resource limits may need to be changed.

This post highlights two scenarios where the user resource limits may need to be changed: the maximum number of user processes is too low, the maximum number of open files is too low.
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Improving Security and Performance with Red Hat & Intel

July 26, 2012

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Advanced Encryption Standard (AES)

What is it?

AES is a Federal Information Processing Standards (FIPS) approved cryptography algorithm (FIPS PUB 197). It is a symmetric-key algorithm. It uses the same cryptographic key for both encryption and decryption. Furthermore, it is a block cipher.

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