Update 3.graph-config.md

docs-2.0/5.configurations-and-logs/1.configurations/3.graph-config.md

@@ -162,7 +162,7 @@ For more information about audit log, see [Audit log](../2.log-management/audit-
 
 | Name                 | Predefined value                   | Description                               |
 | :------------------- | :------------------------ | :------------------------------------------ |
-|`memory_tracker_limit_ratio`    |`0.8`  | The percentage of free memory. When the free memory is lower than this value, NebulaGraph stops querying. <br/> Calculated as follows: <br/> `Free memory / (Total memory - Reserved memory)` <br/> **Note**: For clusters with a mixed-used environment, the value of `memory_tracker_limit_ratio` should be set to a **lower** value. For example, when Graphd is expected to occupy only 50% of memory, the value can be set to less than or equal to `0.5`.|
+|`memory_tracker_limit_ratio`    |`0.8`  | The percentage of free memory. When the free memory is lower than this value, NebulaGraph stops querying. <br/> Calculated as follows: <br/> `Free memory / (Total memory - Reserved memory)` <br/> **Note**: For clusters with a mixed-used environment, the value of `memory_tracker_limit_ratio` should be set to a **lower** value. For example, when Graphd is expected to occupy only 50% of memory, the value can be set to less than `0.5`.|
 |`memory_tracker_untracked_reserved_memory_mb`    |`50`| The reserved memory that is not tracked by the memory tracker. Unit: MB.|
 |`memory_tracker_detail_log`    |`true` | Whether to enable the memory tracker log. When the value is `true`, the memory tracker log is generated.|
 |`memory_tracker_detail_log_interval_ms`    |`60000`| The time interval for generating the memory tracker log. Unit: Millisecond. `memory_tracker_detail_log` is `true` when this parameter takes effect.|