V2.x logging mem [WIP] #4713
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V2.x logging mem [WIP] #4713
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Accept a reference to a vector instead of returning a deque
MySQL_Logger::insertMysqlEventsIntoDb() populate table `stats_mysql_query_events` using mysql query events in the circular buffer
MySQL_Logger::processEvents() is responsible for dumping mysql query events
from the circular buffer into SQLite tables.
DUMP EVENTSLOG commands trigger a call to processEvents():
* DUMP EVENTSLOG FROM BUFFER TO MEMORY: copies events to the in-memory SQLite table
* DUMP EVENTSLOG FROM BUFFER TO DISK: copies events to the on-disk SQLite table
* DUMP EVENTSLOG FROM BUFFER TO BOTH: copies events to both in-memory and on-disk
SQLite tables simultaneously
Added new Admin variable stats_mysql_eventslog_sync_buffer_to_disk . This variable defines how frequently mysql query eventslog are automatically dumped to disk.
In MySQL_Event copy constructor, queries are copied up to eventslog_buffer_max_query_length bytes.
Added enhancements: * added mysql-eventslog_table_memory_size * liste columns names in insertMysqlEventsIntoDb() * added counters and metrics (not exported yet)
Added function MySQL_Logger::getAllMetrics() to export all metrics related to eventlogs
Adding logging for errors generated directly directly by ProxySQL
New `errno` column in tables: - stats_mysql_query_events - history_mysql_query_events Logging into `stats_mysql_errors` also errors generated by ProxySQL (no backend) Added initial TAP test to be extended
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