Monthly Archives: April 2019

Linux – Network settings for high traffic generating application

Posted on April 14, 2019 by acrocontext

/etc/sysctl.conf CENT OS example # default socket memory buffer per a socker net.core.wmem_default=131072(128KB) net.core.rmem_default=131072(128KB) # max socker memory buffer per a socker net.core.wmem_max=2097152(2MB) net.core.rmem_max=2097152(2MB) # tcp buffer size (min, default, max) 4KB, 64KB, 2MB net.ipv4.tcp_wmem=4096 65536 2048000 # enable TCP … Continue reading →

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Websocket protocol details

Posted on April 10, 2019 by acrocontext

Websocket protocol details. http://lucumr.pocoo.org/2012/9/24/websockets-101/

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Java – JVM monitoring tool

Posted on April 4, 2019 by acrocontext

It is an amazing tool to monitor Java application such as thread cpu usage etc. https://github.com/aragozin/jvm-tools

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Python – Spelling correction (Python examples on list comprehension)

Posted on April 4, 2019 by acrocontext

It’s worth to read Python code as examples of using list comprehension semantics. http://norvig.com/spell-correct.html

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