Database and table names. NDB 8.0 removes the previous 63-byte limit on identifiers for databases and tables. These identifiers can now use up to 64 bytes, as for such objects using other MySQL storage engines. See Section 2.7.11, “Previous NDB Cluster Issues Resolved in NDB Cluster 8.0...
MySQL 8.0 delivers NOWAIT and SKIP LOCKED alternatives in the SQL locking clause. Normally, when a row is locked due to an UPDATE or a SELECT ... FOR UPDATE, any other transaction will have to wait to access that locked row. In some use cases there is a need to either return immediat...
Changes in NDB table extra metadata.The extra metadata property of anNDBtable is used for storing serialized metadata from the MySQL data dictionary, rather than storing the binary representation of the table as in previous versions. (This was a.frmfile, no longer used by the MySQL Server—see...
MySQL also has intention locks. These are related to tables and indicate the kind of locks a transaction intends to acquire on rows in the table. Locking is crucial to guarantee consistency and reliability in highly-concurrent environments. However, when optimizing for performance, some trade-off ...
MySQL 8.0 deliversNOWAITandSKIP LOCKEDalternatives in the SQL locking clause. Normally, when a row is locked due to anUPDATEor aSELECT ... FOR UPDATE, any other transaction will have to wait to access that locked row. In some use cases there is a need to either return immediately if a...
Re: What's the cause of table locking other than insert/update/delete? 1504 He Ha February 18, 2011 06:38PM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by...
points to the previous one, which points to the previous one, and so on. Each version has a transaction ID with it so when InnoDB goes looking for a row, it compares your current transaction ID to the row version and selects the right one for you. This can be done without locking. ...
xlsx import / export supports more xlsx features, including cell and sheet locking, formula hiding, all images including svg, hyperlinks to other sheets, cell free rotation, centering value in more cells, styles, format, border and permissions for whole rows and columns, defined names in ...
What do I do if my ApsaraDB RDS instance is in the Locking state? How do I use the OPTIMIZE TABLE statement to release the tablespace of an ApsaraDB RDS for MySQL instance? What do I do if an ApsaraDB RDS for MySQL instance is in th...
I've decided to use InnoDB because of it's locking system. However i think the stress will generate a lot of overhead which, even with a daemon that optimizes the table everyday, is bad. Now another idea came to me. I can use memory tables. The problem is that i can't predict...