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Abdurrahman AG hiage

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hiage / cheatsheet-elasticsearch.md
Created September 21, 2022 14:17 — forked from ruanbekker/cheatsheet-elasticsearch.md
Elasticsearch Cheatsheet : Example API usage of using Elasticsearch with curl
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hiage / gist:f614c1f73a81a2c6fcc6ecdf04c058c4
Created March 30, 2022 04:51 — forked from vongosling/gist:9929680
Performance Tuning

LInux

Three system configuration parameters must be set to support a large number of open files and TCP connections with large bursts of messages. Changes can be made using the /etc/rc.d/rc.local or /etc/sysctl.conf script to preserve changes after reboot.

1. /proc/sys/fs/file-max: The maximum number of concurrently open files.

fs.file-max = 1000000

2. /proc/sys/net/ipv4/tcp_max_syn_backlog: Maximum number of remembered connection requests, which are still did not receive an acknowledgment from connecting client. The default value is 1024 for systems with more than 128Mb of memory, and 128 for low memory machines.

net.ipv4.tcp_max_syn_backlog = 3240000

3. /proc/sys/net/core/somaxconn: Limit of socket listen() backlog, known in userspace as SOMAXCONN. Defaults to 128.

net.core.somaxconn = 3240000

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hiage / nginx_modsecurity.log
Created May 13, 2020 03:00 — forked from vikas027/nginx_modsecurity.log
Nginx compiled with ModSecurity (with JSON Support)
## OS Ubuntu 17.10
## Pre-Requisites
# apt-get install -y git build-essential libpcre3 libpcre3-dev libssl-dev libtool autoconf apache2-dev libxml2-dev libcurl4-openssl-dev automake pkgconf dialog apt-utils
# apt-get install -y g++ flex bison curl doxygen libyajl-dev libgeoip-dev libtool dh-autoreconf libcurl4-gnutls-dev libxml2 libpcre++-dev libxml2-dev libyajl2 yajl-tools
# apt-get install -y libgd2-xpm-dev libgeoip-dev libpam-dev libpcre3 libpcre3-dev google-perftools libgoogle-perftools-dev libatomic-ops-dev libperl-dev
# export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/lib/x86_64-linux-gnu/pkgconfig
## ModSecurity
# cd /usr/src