1, the database connection is not closed. When operating a large number of databases, not closing the connection will cause the database to be stuck by too many connections.
2. The timeout setting for checking the database is too short.
3. Indexes: Too many indexes will lead to fragmentation during database operation, so it is necessary to clean up and reorganize the indexes.
4. When the log file data is too large, the log will be deleted or compressed due to overtime processing, thus reducing the growth of the log file.