Will checkpointing the database environment disrupt, slow or block access to the databases?
A checkpoint doesn’t block access to the Berkeley DB database environment, and threads of control can continue to read and write databases during checkpoint. However, the checkpoint potentially triggers a large amount of I/O which could slow other threads of control, and make it appear that access has been blocked.You can use the DB_ENV->memp_trickle method to spread out the I/O that checkpoint will need to perform (the DB_ENV->memp_trickle method ensures a specified percent of the pages in the cache are kept clean). Alternatively, you can limit the number of sequential write operations scheduled by the DB library, using the DB_ENV->memp_set_max_write method. The DB_ENV->memp_set_max_write method affects all of the methods that flush the database cache (checkpoint, as well as other methods, for example, DB->sync). A transactional database environment cannot be recovered or normal database operations fail with messages that “LSN” values are past the end of the log. The application or so
A checkpoint doesn’t block access to the Berkeley DB database environment, and threads of control can continue to read and write databases during checkpoint. However, the checkpoint potentially triggers a large amount of I/O which could slow other threads of control, and make it appear that access has been blocked. You can use the DB_ENV->memp_trickle method to spread out the I/O that checkpoint will need to perform (the DB_ENV->memp_trickle method ensures a specified percent of the pages in the cache are kept clean). Alternatively, you can limit the number of sequential write operations scheduled by the DB library, using the DB_ENV->memp_set_max_write method. The DB_ENV->memp_set_max_write method affects all of the methods that flush the database cache (checkpoint, as well as other methods, for example, DB->sync). A transactional database environment cannot be recovered or normal database operations fail with messages that “LSN” values are past the end of the log. The application or s
A checkpoint doesn’t block access to the Berkeley DB database environment, and threads of control can continue to read and write databases during checkpoint. However, the checkpoint potentially triggers a large amount of I/O which could slow other threads of control, and make it appear that access has been blocked. You can use the DB_ENV->memp_trickle method to spread out the I/O that checkpoint will need to perform (the DB_ENV->memp_trickle method ensures a specified percent of the pages in the cache are kept clean). Alternatively, you can limit the number of sequential write operations scheduled by the DB library, using the DB_ENV->memp_set_max_write method. The DB_ENV->memp_set_max_write method affects all of the methods that flush the database cache (checkpoint, as well as other methods, for example, DB->sync).
