[WIP]: add v8.5.0 release notes #19336
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Co-authored-by: Frank945946 <[email protected]>
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Co-authored-by: Frank945946 <[email protected]>
Co-authored-by: xixirangrang <[email protected]>
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| <td><a href="https://docs.pingcap.com/tidb/v8.5/partitioned-table#global-indexes">Global indexes for partitioned tables</a> (GA in v8.4.0)</td> | ||
| <td>Global indexes can effectively improve the efficiency of retrieving non-partitioned columns, and remove the restriction that a unique key must contain the partition key. This feature extends the usage scenarios of TiDB partitioned tables, and avoids some of the application modification work required for data migration.</td> |
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| <td>Global indexes can effectively improve the efficiency of retrieving non-partitioned columns, and remove the restriction that a unique key must contain the partition key. This feature extends the usage scenarios of TiDB partitioned tables, and avoids some of the application modification work required for data migration.</td> | |
| <td>Global indexes can effectively improve the efficiency of retrieving non-partitioned columns, and remove the restriction that a unique key must contain the partition key. This feature extends the usage scenarios of TiDB partitioned tables, improved the performance of partitioned tables and reduced resource consumption in certain query scenarios.</td> |
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| ### Scalability | ||
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| * Setting the memory limit for schema cache is now generally available (GA), reducing memory usage in large-scale data scenarios [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd <!--1976--> |
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| * Setting the memory limit for schema cache is now generally available (GA), reducing memory usage in large-scale data scenarios [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd <!--1976--> | |
| * Setting the memory limit for schema cache is now generally available (GA), when the number of tables reaches hundreds of thousands or even millions, it significantly reduces the memory usage of Schema Mate [#50959](https://github.com/pingcap/tidb/issues/50959) @[tiancaiamao](https://github.com/tiancaiamao) @[wjhuang2016](https://github.com/wjhuang2016) @[gmhdbjd](https://github.com/gmhdbjd) @[tangenta](https://github.com/tangenta) tw@hfxsd <!--1976--> |
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