--- title: OceanBase 租户 CPU 超卖配置实践-OceanBase数据库使用指南 description: 了解OceanBase数据库在实际应用中关于OceanBase 租户 CPU 超卖配置实践相关的常见问题和使用技巧，帮助您快速解决OceanBase 租户 CPU 超卖配置实践的难题。 image: https://mdn.alipayobjects.com/huamei_22khvb/afts/img/A*OSPzQ6GUQF4AAAAAQHAAAAgAeiGDAQ/original --- 切换语言 - 中文站 - 简体中文 - International - English - 日本站 - 日本語 划线反馈 # OceanBase 租户 CPU 超卖配置实践 更新时间：2026-07-02 15:41 适用版本： V3.1.x、V3.2.x、V4.0.x、V4.1.x、V4.2.x、V4.3.x 内容类型：TechNote OceanBase CPU 超卖适用于同一集群中不同租户间负载峰值错峰的场景，从而提高整体资源使用率。如果租户间峰值同时出现，开启 CPU 超卖可能导致租户之间 CPU 资源的互相抢占，互相影响，引发租户请求等待、响应时间抖动。 **备注：OceanBase 数据库仅支持 CPU 超卖，不支持其他资源的超卖**。 **说明：本文档区别于 OceanBase 官方文档提供的租户 CPU 超卖方案，OCP 中租户规格无 `min_cpu`、`max_cpu` 超卖标识，适用于代理二次售卖 OceanBase 租户场景**。 ## 详细说明【配置案例】 1. OceanBase 服务器 CPU 配置及集群 CPU 配额。 ```shell lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian Address sizes: 48 bits physical, 48 bits virtual CPU(s): 32 --OceanBase 服务器逻辑CPU 32核 On-line CPU(s) list: 0-31 登录集群 sys 租户 MySQL [oceanbase]> select svr_Ip,cpu_capacity,cpu_capacity_max,cpu_assigned,cpu_assigned_max from __all_virtual_server; +------------+--------------+------------------+--------------+------------------+ | svr_Ip | cpu_capacity | cpu_capacity_max | cpu_assigned | cpu_assigned_max | +------------+--------------+------------------+--------------+------------------+ |xx.xx.xx.xx | 32 | 32 | 29 | 29 | +------------+--------------+------------------+--------------+------------------+ ``` ![image01](https://obbusiness-private.oss-cn-shanghai.aliyuncs.com/doc/img/knowledge-base/database/tenant/20250929ob-tenant-cpu-overselling-configuration-practice01.png) 2. 配置集群 CPU 超卖。 ```shell 登录集群sys租户 MySQL [oceanbase]> show parameters like 'cpu_count'\G *************************** 1. row *************************** zone: zone1 svr_type: observer svr_ip: xx.xx.xx.xx svr_port: 2882 name: cpu_count data_type: NULL value: 0 info: the number of CPU\'s in the system. If this parameter is set to zero, the number will be set according to sysconf; otherwise, this parameter is used. Range: [0,+¡Þ) in integer section: OBSERVER scope: CLUSTER source: DEFAULT edit_level: DYNAMIC_EFFECTIVE default_value: 0 isdefault: 1 MySQL [oceanbase]> alter system set cpu_count=48; Query OK, 0 rows affected (0.092 sec) 在线生效 MySQL [oceanbase]> show parameters like 'cpu_count'\G *************************** 1. row *************************** zone: zone1 svr_type: observer svr_ip: xx.xx.xx.xx svr_port: 2882 name: cpu_count data_type: NULL value: 48 info: the number of CPU\'s in the system. If this parameter is set to zero, the number will be set according to sysconf; otherwise, this parameter is used. Range: [0,+¡Þ) in integer section: OBSERVER scope: CLUSTER source: DEFAULT edit_level: DYNAMIC_EFFECTIVE default_value: 0 isdefault: 0 1 row in set (0.060 sec) MySQL [oceanbase]> select svr_Ip,cpu_capacity,cpu_capacity_max,cpu_assigned,cpu_assigned_max from __all_virtual_server; +------------+--------------+------------------+--------------+------------------+ | svr_Ip | cpu_capacity | cpu_capacity_max | cpu_assigned | cpu_assigned_max | +------------+--------------+------------------+--------------+------------------+ |xx.xx.xx.xx | 48 | 48 | 29 | 29 | +------------+--------------+------------------+--------------+------------------+ ``` ![image02](https://obbusiness-private.oss-cn-shanghai.aliyuncs.com/doc/img/knowledge-base/database/tenant/20250929ob-tenant-cpu-overselling-configuration-practice02.png) 3. 租户 CPU 扩容，验证超卖。 ![image03](https://obbusiness-private.oss-cn-shanghai.aliyuncs.com/doc/img/knowledge-base/database/tenant/20250929ob-tenant-cpu-overselling-configuration-practice03.png) ```shell OCP 租户 CPU 规格由 10c 调大至 20c MySQL [oceanbase]> select svr_Ip,cpu_capacity,cpu_capacity_max,cpu_assigned,cpu_assigned_max from __all_virtual_server; +------------+--------------+------------------+--------------+------------------+ | svr_Ip | cpu_capacity | cpu_capacity_max | cpu_assigned | cpu_assigned_max | +------------+--------------+------------------+--------------+------------------+ |xx.xx.xx.xx | 48 | 48 | 39 | 39 | +------------+--------------+------------------+--------------+------------------+ MySQL [oceanbase]> select zone,MIN_CPU,MAX_CPU from gv$ob_units where tenant_id=1004; +-------+---------+---------+ | zone | MIN_CPU | MAX_CPU | +-------+---------+---------+ | zone1 | 20 | 20 | +-------+---------+---------+ ``` ![image04](https://obbusiness-private.oss-cn-shanghai.aliyuncs.com/doc/img/knowledge-base/database/tenant/20250929ob-tenant-cpu-overselling-configuration-practice04.png) ![image05](https://obbusiness-private.oss-cn-shanghai.aliyuncs.com/doc/img/knowledge-base/database/tenant/20250929ob-tenant-cpu-overselling-configuration-practice05.png) ## 适用版本 OceanBase 数据库 V3.x、V4.x 版本。 Previous [Oracle 租户环境中用户删除操作受阻解决方案](https://www.oceanbase.com/knowledge-base/oceanbase-database-1000000003238762) Next [缩小租户规格时遇到报错 requested memory over 90% 的原因和解决方法](https://www.oceanbase.com/knowledge-base/oceanbase-database-1000000003796389) ![有帮助](https://gw.alipayobjects.com/mdn/ob_asset/afts/img/A*y6ocSqN8cqsAAAAAAAAAAAAAARQnAQ)![无帮助](https://gw.alipayobjects.com/mdn/ob_asset/afts/img/A*BG9IQJyLHF8AAAAAAAAAAAAAARQnAQ)![反馈](https://gw.alipayobjects.com/mdn/ob_asset/afts/img/A*eTWdQKCRKHwAAAAAAAAAAAAAARQnAQ)[AI](https://www.oceanbase.com/obi) 咨询热线