Slow query logging for debugging of mysql configuration issues
flex.bi server gets very slow response times from import or report queries. Sometimes this causes a report execution timeouts, sometimes error messages about not being able to lock records or other database related messages in queues log file.
Enabling logging of slow queries might help to trace the cause of the problem if it is database configuration problem. Enter these commands in you mysql configuration (usually
long_query_time = 10 slow_query_log = 1 slow_query_log_file = /var/log/mysql/log-slow-queries.logCODE
Create the file
/var/log/messages.log-slow-queries.logand make sure it can be accessed by the system user running mysql - usually user mysql.
mkdir /var/log/mysql touch /var/log/mysql/log-slow-queries.log chown mysql:mysql /var/log/mysql/log-slow-queries.logCODE
Then restart mysql service and monitor the file.
systemctl restart mysqldCODE