7.4.10
- A serious regression was inadvertently introduced in MySQL Cluster NDB
7.4.8 whereby local checkpoints and thus restarts often took much longer
than expected.
See more at:
http://dev.mysql.com/doc/relnotes/mysql-cluster/7.4/en/mysql-cluster-news-7-4-10.html
7.4.9
- Important Change: Previously, the NDB scheduler always optimized for
speed against throughput in a predetermined manner (this was hard coded);
this balance can now be set using the SchedulerResponsiveness data node
configuration parameter.
- Added the tc_time_track_stats table to the ndbinfo information database.
- Cluster Replication: Normally, RESET SLAVE causes all entries to be
deleted from the mysql.ndb_apply_status table. This release adds
the ndb_clear_apply_status system variable, which makes it possible
to override this behavior.
See more at:
http://dev.mysql.com/doc/relnotes/mysql-cluster/7.4/en/mysql-cluster-news-7-4-9.html
7.4.8
- Changes have been made in the minimum values for a number of parameters
applying to data buffers for backups and LCPs. These parameters, listed
here, can no longer be set so as to make the system impossible to run:
- BackupDataBufferSize: minimum increased from 0 to 2M.
- BackupLogBufferSize: minimum increased from 0 to 2M.
- BackupWriteSize: minimum increased from 2K to 32K.
- BackupMaxWriteSize: minimum increased from 2K to 256K.
In addition, the BackupMemory data node parameter is now deprecated and
subject to removal in a future version of MySQL Cluster. Use
BackupDataBufferSize and BackupLogBufferSize instead.
- When a backup was unsuccessful due to insufficient resourcesa subsequent
retry worked only for those parts of the backup that worked in the same
thread, since delayed signals are only supported in the same thread.
Delayed signals are no longer sent to other threads in such cases.
- An instance of an internal list object used in searching for queued
scans was not actually destroyed before calls to functions that could
manipulate the base object used to create it.
- ACC scans were queued in the category of range scans, which could lead
to starting an ACC scan when DBACC had no free slots for scans. We fix
this by implementing a separate queue for ACC scans.
- Cluster Replication: Added the create_old_temporals server system
variable to compliment the system variables avoid_temporal_upgrade and
show_old_temporals introduced in MySQL 5.6.24 and available in MySQL
Cluster beginning with NDB 7.3.9 and NDB 7.4.6.
- When the --database option has not been specified for ndb_show_tables,
and no tables are found in the TEST_DB database, an appropriate warning
message is now issued.
- Bug fixes.
See more at
http://dev.mysql.com/doc/relnotes/mysql-cluster/7.4/en/mysql-cluster-news-7-4-8.html
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