My set up is the following:
- website running both the php code and the mariaDB 10.2 dabatase
- local "Master" database under mariaDB 5.3 with 100MB/s internet connection where I need to have synchronous updates (inputs can be made on both ends)
Running simple queries like
select * from table
Takes ages (more than 45s).
When I look at processor and RAM usage, both are low (3% and 7% respectively at most).
The traffic takes this shape when I run a query:
My questions are then:
- Is the latency normal in those cases when tables are linked by the Federated engine or is there something wrong ?
- Why the query pulls around 150KB/s for 30 seconds and then finally jumps to some decent bandwith.
- Are there some generic configurations to be made to speed up the queries ? (ex: identical mariaDB versions)
Thanks much for your help !!
question from:https://stackoverflow.com/questions/65937481/slow-sql-query-with-federated-engine
