---
title: "ALTER SYSTEM SET PARAMETER - OceanBase 数据库 V4.6.0 | OceanBase 文档中心"
description: ALTER SYSTEM SET PARAMETER 描述 该语句用来修改本租户的配置项信息。 语法 ALTER SYSTEM SET parameter_name = expression; 参数解释 参数 描述 parameter_name 指定要修改的配置项名称。 expression 指定修改后的配置项的值。…
---
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文档反馈![](https://mdn.alipayobjects.com/huamei_22khvb/afts/img/A*P8CuR4UJ_FkAAAAAAAAAAAAADiGDAQ/original) OceanBase 数据库分布式版 - V 4.6.0

# ALTER SYSTEM SET PARAMETER

更新时间：2026-04-30 18:31:43

[编辑](https://github.com/oceanbase/oceanbase-doc/edit/V4.6.0/zh-CN/700.reference/500.sql-reference/100.sql-syntax/300.common-tenant-of-oracle-mode/900.sql-statement-of-oracle-mode/100.ddl-of-oracle-mode/900.alter-system-parameter-of-oracle-mode.md)  

## 描述

该语句用来修改本租户的配置项信息。

## 语法

```sql
ALTER SYSTEM SET parameter_name = expression;

```

## 参数解释

| **参数** | **描述** |
| --- | --- |
| parameter_name | 指定要修改的配置项名称。 |
| expression | 指定修改后的配置项的值。 |

## 示例

修改配置项 `log_disk_utilization_threshold` 的信息。

```sql
obclient> SHOW PARAMETERS LIKE 'log_disk_utilization_threshold';

```

预期返回结果：

```sql
+-------+----------+----------------+----------+--------------------------------+-----------+-------+--------------------------------------------------------------------------------------------------------------------------------------+------------+--------+---------+-------------------+
| zone  | svr_type | svr_ip        | svr_port | name                          | data_type | value | info                                                                                                                                     | section    | scope  | source  | edit_level        |
+-------+----------+----------------+----------+--------------------------------+-----------+-------+--------------------------------------------------------------------------------------------------------------------------------------+------------+--------+---------+-------------------+
| zone1 | observer | xx.xx.xx.xx   | 2882     | log_disk_utilization_threshold| NULL      | 80    | log disk utilization threshold before reuse log files, should be smaller than log_disk_utilization_limit_threshold. Range: [10, 100)    | LOGSERVICE | TENANT | DEFAULT | DYNAMIC_EFFECTIVE |
+-------+----------+----------------+----------+--------------------------------+-----------+-------+--------------------------------------------------------------------------------------------------------------------------------------+------------+--------+---------+-------------------+
1 row in set

```

```sql
obclient> ALTER SYSTEM SET log_disk_utilization_threshold = 20;

obclient> SHOW PARAMETERS LIKE 'log_disk_utilization_threshold';

```

预期返回结果：

```sql

+-------+----------+----------------+----------+--------------------------------+-----------+-------+--------------------------------------------------------------------------------------------------------------------------------------+------------+--------+---------+-------------------+
| zone  | svr_type | svr_ip         | svr_port | name                           | data_type | value | info                                                                                                                                 | section    | scope  | source  | edit_level        |
+-------+----------+----------------+----------+--------------------------------+-----------+-------+--------------------------------------------------------------------------------------------------------------------------------------+------------+--------+---------+-------------------+
| zone1 | observer | xx.xx.xx.xx    |     2882 | log_disk_utilization_threshold | NULL      | 20    | log disk utilization threshold before reuse log files, should be smaller than log_disk_utilization_limit_threshold. Range: [10, 100) | LOGSERVICE | TENANT | DEFAULT | DYNAMIC_EFFECTIVE |
+-------+----------+----------------+----------+--------------------------------+-----------+-------+--------------------------------------------------------------------------------------------------------------------------------------+------------+--------+---------+-------------------+
1 row in set

```

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