I'm running a
Java application that creates 50 threads as part of a threadpool; each thread running in an object that reads 1000 unique rows at a time from a
MySQL table. So each object has it's own
SqlManager class I created which can open an Sql connection.
wait_timeout is 28800, which would be 8 hours (am surprised it is that long), so I assume that a connection once established, won't expire until 8 hours are over. My program though, runs for more than 8 hours, and I've increased the
max_connections variable to 5000 too.
Currently I've programmed each thread object to check if 2 hours have elapsed, and if it has, then close the
MySQL connection and re-open the connection.
Is this an appropriate technique of dealing with the problem, or does the connection expire only if it hasn't been used for any query for a long time? My program constantly queries the database all through those hours.