add release notes v9.0.0 - bugfix part #20383
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| @@ -322,11 +318,9 @@ TiDB 版本：9.0.0 | |||
| | TiKV | [`storage.max-ts.max-drift`](/tikv-configuration-file.md#max-drift-从-v900-版本开始引入) | 新增 | 定义当读写请求使用的 TS 超过 TiKV 缓存的 PD TSO 时，所允许的最长超出时间。默认值为`"60s"`。 | | |||
| | TiFlash | [`hashagg_use_magic_hash`](/tiflash/tiflash-configuration.md#hashagg_use_magic_hash-从-v900-版本开始引入) | 新增 | 控制 TiFlash 在进行聚合操作时使用的哈希函数。 | | |||
| | TiFlash | [`format_version`](/tiflash/tiflash-configuration.md#format_version) | 修改 | 默认值从 `7` 变更为 `8`，代表 v9.0.0 以及以后版本 DTFile 文件的默认格式 `8`。该格式用于支持新的字符串序列化方案，可提升字符串的读写性能。 | | |||
| <!-- | |||
| | TiCDC | [`newarch`](/ticdc/ticdc-server-config.md#newarch) | 新增 | 控制是否开启 [TiCDC 新架构](/ticdc/ticdc-new-arch.md)。默认值为不设置，表示使用老架构。该配置项仅用于新架构，如果在 TiCDC 老架构的配置文件中添加该配置项，可能会导致解析失败。 | | |||
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这个 TiCDC newarch 配置对应的文档 PR 目前仍然是还没有合并，可以保持 comment out
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[LGTM Timeline notifier]Timeline:
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