I wanted to add RabbitMQ support to my PHP app and prefer to use the PECL amqp package:
This extension can communicate with any AMQP spec 0-9-1 compatible server, such as RabbitMQ, OpenAMQP and Qpid, giving you the ability to create and delete exchanges and queues, as well as publish to any exchange and consume from any queue.
Using pecl install
won’t install all the dependencies. There are various options to how to solve this including fetching from Git repos, however this is the one that worked for me and seemed the most straight-forward (ymmv). See below for code used in a Dockerfile with base image FROM php:7.1.14-apache which uses debian:jessie
, so the native commands should work in similar Debian/Ubuntu linux distros.
RUN curl http://in.archive.ubuntu.com/ubuntu/ubuntu/pool/universe/libr/librabbitmq/librabbitmq4_0.8.0-1_amd64.deb -o librabbitmq4_0.8.0-1_amd64.deb RUN curl http://in.archive.ubuntu.com/ubuntu/ubuntu/pool/universe/libr/librabbitmq/librabbitmq-dev_0.8.0-1_amd64.deb -o librabbitmq-dev_0.8.0-1_amd64.deb RUN dpkg -i librabbitmq4_0.8.0-1_amd64.deb RUN dpkg -i librabbitmq-dev_0.8.0-1_amd64.deb RUN pecl install amqp-1.9.3 && docker-php-ext-enable amqp |
Note if you do use this in a Dockerfile, you can combine some of the statements to optimize layers. You also may need to update the lib version if it’s updated or if you change the PECL version to install.
You can use INFO to get total memory size and a lot of other useful bits but if you just want to know the size of a single database or other info about database-specific keys, it can be a bit tricky.
see: https://stackoverflow.com/questions/7638542/redis-show-database-size-size-for-keys
tldr; in many cases, all you might need is:
redis-cli --bigkeys |
To see what’s going on real-time:
redis-cli MONITOR |
You need to specify charset in slave config, e.g.,
'slaveConfig' => [ 'charset' => 'utf8', ... |
# backup: $ sysctl -a > /home/sysctl_$(date +%Y%m%d).bak #check: $ sysctl -a # make changes to sysctl.conf: $ vi/nano /etc/sysctl.conf # web - nginx, redis, mongo, etc: vm.swappiness = 10 vm.dirty_ratio = 40 vm.dirty_background_ratio = 10 # for larger servers: net.ipv4.tcp_rmem = 4096 12582912 33554432 net.ipv4.tcp_wmem = 4096 12582912 33554432 net.core.rmem_max = 33554432 net.core.wmem_max = 33554432 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_timestamps = 1 net.ipv4.tcp_sack = 1 # net.ipv4.tcp_max_syn_backlog = 65536 kernel.keys.root_maxkeys = 1000000 #Raise somaxconn (above 511) net.core.somaxconn = 4096 # vm.overcommit_memory (optional): # vm.overcommit_memory = 1 #### # set in /etc/rc.local (test reboot stickiness) # ensure changes to sysctl configuration persist across reboots: $ sysctl -p if test -f /sys/kernel/mm/transparent_hugepage/enabled; then echo never > /sys/kernel/mm/transparent_hugepage/enabled fi if test -f /sys/kernel/mm/transparent_hugepage/defrag; then echo never > /sys/kernel/mm/transparent_hugepage/defrag fi |
more info:
$ cat /proc/$(cat /run/nginx.pid)/limits $ nano /lib/systemd/system/nginx.service # --> [Service] LimitNOFILE=16384 $ systemctl daemon-reload $ systemctl restart nginx && systemctl status nginx |