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update #887

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Aug 20, 2021
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update #887

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10 changes: 9 additions & 1 deletion docs-2.0/8.service-tuning/compaction.md
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Expand Up @@ -14,7 +14,10 @@ Nebula Graph有两种类型的`Compaction`操作：自动`Compaction`和全量`C

## 自动`Compaction`

自动`Compaction`是在系统读取数据、写入数据或系统重启时自动触发`Compaction`操作，提升短时间内的读取性能。默认情况下，自动`Compaction`是开启状态，可能在业务高峰期触发，导致意外抢占IO影响业务。如果需要完全手动控制`Compaction`操作，用户可以关闭自动`Compaction`。
自动`Compaction`是在系统读取数据、写入数据或系统重启时自动触发`Compaction`操作，提升短时间内的读取性能。默认情况下，自动`Compaction`是开启状态，可能在业务高峰期触发，导致意外抢占IO影响业务。

<!--
如果需要完全手动控制`Compaction`操作，用户可以关闭自动`Compaction`。

### 关闭自动`Compaction`

Expand Down Expand Up @@ -52,6 +55,7 @@ nebula> SHOW CONFIGS STORAGE;
+-----------+-------------------------------------+-------+-----------+--------------------------------------------------------------------------------------------------------------------------------------+
...
```
-->

## 全量`Compaction`

Expand All @@ -76,13 +80,17 @@ nebula> SHOW JOB <job_id>;

为保证Nebula Graph的性能，请参考如下操作建议：

<!--
- 数据写入时为避免浪费IO，请在大量数据写入前关闭自动`Compaction`。详情请参见[关闭自动`Compaction`](#compaction_2)。
-->

- 数据导入完成后，请执行`SUBMIT JOB COMPACT`。

- 业务低峰期（例如凌晨）执行`SUBMIT JOB COMPACT`。

<!--
- 白天时设置`disable_auto_compactions`为`false`，提升短时间内的读取性能。
-->

- 为控制`Compaction`的读写速率，请在配置文件`nebula-storaged.conf`中设置如下两个参数：

Expand Down