From 7894033a97b863f29a185589ce92c17f04506eb3 Mon Sep 17 00:00:00 2001 From: Grace Cai Date: Thu, 9 May 2024 09:59:30 +0800 Subject: [PATCH] Update releases/release-7.3.0.md Co-authored-by: xixirangrang --- releases/release-7.3.0.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/releases/release-7.3.0.md b/releases/release-7.3.0.md index eb9886fd7296e..18ae57e079614 100644 --- a/releases/release-7.3.0.md +++ b/releases/release-7.3.0.md @@ -157,7 +157,7 @@ Quick access: [Quick start](https://docs.pingcap.com/tidb/v7.3/quick-start-with- * TiDB - - MPP is a distributed computing framework provided by the TiFlash engine, which allows data exchange between nodes and provides high-performance, high-throughput SQL algorithms. Compared with other protocols, the MPP protocol is more mature and can provide better task and resource management. Starting from v7.3.0, when TiDB pushes computation tasks to TiFlash, the optimizer only generates execution plans using the MPP protocol by default. If [`tidb_allow_mpp`](/system-variables.md#tidb_allow_mpp-introduced-in-v50) is set to `OFF`, queries might return errors after you upgrade TiDB. It is recommended that you check the value of `tidb_allow_mpp` and set it to `ON` before the upgrade. If you still need the optimizer to choose one of the Cop, BatchCop, and MPP protocols for generating execution plans based on cost estimates, you can set the [`tidb_allow_tiflash_cop`](/system-variables.md#tidb_allow_tiflash_cop-introduced-in-v730) variable to `ON`. + - MPP is a distributed computing framework provided by the TiFlash engine, which allows data exchange between nodes and provides high-performance, high-throughput SQL algorithms. Compared with other protocols, the MPP protocol is more mature and can provide better task and resource management. Starting from v7.3.0, when TiDB pushes computation tasks to TiFlash, the optimizer only generates execution plans using the MPP protocol by default. If [`tidb_allow_mpp`](/system-variables.md#tidb_allow_mpp-introduced-in-v50) is set to `OFF`, queries might return errors after you upgrade TiDB. It is recommended that you check the value of `tidb_allow_mpp` and set it to `ON` before the upgrade. If you still need the optimizer to choose one of the Cop, BatchCop, and MPP protocols for generating execution plans based on cost estimates, you can set the [`tidb_allow_tiflash_cop`](/system-variables.md#tidb_allow_tiflash_cop-new-in-v730) variable to `ON`. * Backup & Restore (BR)