doc: correct high performance writing to be adapted to 3.0

docs/en/07-develop/03-insert-data/05-high-volume.md

@@ -46,12 +46,9 @@ If the data source is Kafka, then the appication program is a consumer of Kafka,
 
 ### Tune TDengine
 
-TDengine is a distributed and high performance time series database, there are also some ways to tune TDengine to get better writing performance.
+On the server side, database configuration parameter `vgroups` needs to be set carefully to maximize the system performance. If it's set too low, the system capability can't be utilized fully; if it's set too big, unnecessary resource competition may be produced. A normal recommendation for `vgroups` parameter is 2 times of the number of CPU cores. However, depending on the actual system resources, it may still need to tuned.
 
-1. Set proper number of `vgroups` according to available CPU cores. Normally, we recommend 2 \* number_of_cores as a starting point. If the verification result shows this is not enough to utilize CPU resources, you can use a higher value.
-2. Set proper `minTablesPerVnode`, `tableIncStepPerVnode`, and `maxVgroupsPerDb` according to the number of tables so that tables are distributed even across vgroups. The purpose is to balance the workload among all vnodes so that system resources can be utilized better to get higher performance.
-
-For more performance tuning parameters, please refer to [Configuration Parameters](../../../reference/config).
+For more configuration parameters, please refer to [Database Configuration](../../../taos-sql/database) and [Server Configuration](../../../reference/config)。
 
 ## Sample Programs
 

docs/zh/07-develop/03-insert-data/05-high-volume.md

@@ -38,13 +38,9 @@ import TabItem from "@theme/TabItem";
 
 ### 服务器配置的角度 {#setting-view}
 
-从服务器配置的角度来说，也有很多优化写入性能的方法。
+从服务端配置的角度，要根据系统中磁盘的数量，磁盘的 I/O 能力，以及处理器能力在创建数据库时设置适当的 vgroups 数量以充分发挥系统性能。如果 vgroups 过少，则系统性能无法发挥；如果 vgroups 过多，会造成无谓的资源竞争。常规推荐 vgroups 数量为 CPU 核数的 2 倍，但仍然要结合具体的系统资源配置进行调优。
 
-如果总表数不多(远小于核数乘以1000), 且无论怎么调节客户端程序，taosd 进程的 CPU 使用率都很低，那么很可能是因为表在各个 vgroup 分布不均。比如：数据库总表数是 1000 且 minTablesPerVnode 设置的也是 1000，那么所有的表都会分布在 1 个 vgroup 上。此时如果将 minTablesPerVnode 和 tablelncStepPerVnode 都设置成 100， 则可将表分布至 10 个 vgroup。（假设 maxVgroupsPerDb 大于等于 10）。
-
-如果总表数比较大（比如大于500万），适当增加 maxVgroupsPerDb 也能显著提高建表的速度。maxVgroupsPerDb 默认值为 0， 自动配置为 CPU 的核数。 如果表的数量巨大，也建议调节 maxTablesPerVnode 参数，以免超过单个 vnode 建表的上限。
-
-更多调优参数，请参考 [配置参考](../../../reference/config)部分。
+更多调优参数，请参考 [数据库管理](../../../taos-sql/database) 和 [服务端配置](../../../reference/config)。
 
 ## 高效写入示例 {#sample-code}