Ubuntu 16.04 does not have MySQL 5.5, it has 5.7. The most likely explanation for the memory usage going up is that default buffer sizes have been increased significantly for mysqld over the last few releases. You may need to edit config files to reduce the buffers.
Ubuntu 16.04 does not have MySQL 5.5, it has 5.7. The most likely explanation for the memory usage going up is that default buffer sizes have been increased significantly for mysqld over the last few releases. You may need to edit config files to reduce the buffers.