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releases: add the release notes for TiDB 2.0.1 #469
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,49 @@ | ||
| --- | ||
| title: TiDB 2.0.1 Release Notes | ||
| category: Releases | ||
| --- | ||
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| # TiDB 2.0.1 Release Notes | ||
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| On May 16, 2018, TiDB 2.0.1 is released. Compared with TiDB 2.0.0 (GA), this release has great improvement in MySQL compatibility and system stability. | ||
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| ## TiDB | ||
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| - Update the progress of `Add Index` to the DDL job information in real time | ||
| - Add the `tidb_auto_analyze_ratio` session variable to control the threshold value of automatic statistics update | ||
| - Fix an issue that not all residual states are cleaned up when the transaction commit fails | ||
| - Fix a bug about adding indexes in some conditions | ||
| - Fix the correctness related issue when DDL modifies surface operations in some concurrent scenarios | ||
| - Fix a bug that the result of `LIMIT` is incorrect in some conditions | ||
| - Fix a capitalization issue of the `ADMIN CHECK INDEX` statement to make its index name case insensitive | ||
| - Fix a compatibility issue of the `UNION` statement | ||
| - Fix a compatibility issue when inserting data of `TIME` type | ||
| - Fix a goroutine leak issue caused by `copIteratorTaskSender` in some conditions | ||
| - Add an option for TiDB to control the behaviour of Binlog failure | ||
| - Refactor the `Coprocessor` slow log to distinguish between the scenario of tasks with long processing time and long waiting time | ||
| - Log nothing when meeting MySQL protocol handshake error, to avoid too many logs caused by the load balancer Keep Alive mechanism | ||
| - Refine the “Out of range value for column” error message | ||
| - Fix a bug when there is a subquery in an `Update` statement | ||
| - Change the behaviour of handling `SIGTERM`, and do not wait for all queries to terminate anymore | ||
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| ## PD | ||
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| - Add the `Scatter Range` scheduler to balance Regions with the specified key range | ||
| - Optimize the scheduling of Merge Region to prevent the newly split Region from being merged | ||
| - Add Learner related metrics | ||
| - Fix the issue that the scheduler is mistakenly deleted after restart | ||
| - Fix the error that occurs when parsing the configuration file | ||
| - Fix the issue that the etcd leader and the PD leader are not synchronized | ||
| - Fix the issue that Learner still appears after it is closed | ||
| - Fix the issue that Regions fail to load because the packet size is too large | ||
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| ## TiKV | ||
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| - Fix the issue that `SELECT FOR UPDATE` prevents others from reading | ||
| - Optimize the slow query log | ||
| - Reduced number of `thread_yield` calls | ||
| - Fix the bug that raftstore is accidentally blocked when generating the snapshot | ||
| - Fix the issue that Learner cannot be successfully elected in special conditions | ||
| - Fix the issue that split might cause dirty read in extreme conditions | ||
| - Correct the default value of the read thread pool configuration | ||
| - Speed up Delete Range | ||
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Reduce the number of
thread_yieldcalls