Network Troubleshoot – Slow WHMCS – Monitoring Outgoing Web Connections from Apache
Synopsis slow WHMCS. Nothing has changed. Inspect element shows nothing. Only the front-end, and nothing on the back-end. The only clue we have is the
mysql
How to handle slow query logging on MariaDB
Sometimes once you have eliminated all bottlenecks, e.g. NVME and RAM and vCPUs, then all that is left is to check the database. I like
Isolating disk write performance problems on heavy loaded shared hosting WordPress servers
Background On a heavy loaded WordPress server you might experience the following when looking at iotop. Heavy writes. Additional graphing of the disk’s writes might
Kopano Server Memory Optimization Exercise
Kopano servers need memory optimization. There is an entire chapter written about it here: https://documentation.kopano.io/kopanocore_administrator_manual/performance_tuning.html Unfortunately Kopano open source is dead and they left their
Problems with MySQL table optimisation
Example: mysql> optimize table wp_actionscheduler_actions; +——————————————-+———-+———-+——————————————————————-+ | Table
Massive amounts of disk space consumed by MySQL and Mariadb binlog files
Background You might find on a MySQL 8.x or MariaDB 10.4 server that suddenly disk space just evaporates. After using ncdu you see the problem
Dealing with a MySQL race condition and All in One SEO on a WordPress server
Background A fairly complex server has been misbehaving. This has been ongoing for a few weeks. The problem was been hard to isolate because the
What defines small medium large and huge on a Virtualmin MySQL installation?
Background When installing Virtualmin, the system will prompt for small, medium, large and huge. The question is how are these parameters defined? By examining the
MySQL Invalid default value for XXX datetime based field
Working servers suddenly start giving the error below when restoring a MySQL database that contains datetime fields with 0000-00-00 defaults: user@server:/tmp# mysql -uuser -ppassword database_name
Whilst restoring a MariaDB Backup from one Virtualmin server to another, MySQL create and grant errors
Background On a legacy server with an older version of MariaDB, restoring to a newer Virtualmin server that run MySQL 8 might be problematic. The