Parameter description

Get configuration parameters

Log on to OceanBase Database Proxy (ODP) with the root@proxysys account and run the following command to obtain the ODP configurations:

SHOW proxyconfig [LIKE '%var_name%'];

Parameters

ODP allows you to configure parameters as needed. This section describes the parameters that you may need to configure.

ODP parameters are divided into the following four categories:

• Dynamically modifiable parameters

  These parameters take effect immediately after they are modified. For more information, see Dynamically modifiable parameters.

• Parameters that are not dynamically modifiable

  These parameters take effect after you restart ODP. For more information, see Parameters that are not dynamically modifiable.

• Parameters that are invisible to common users

  Parameters for internal use in ODP and configurations inherited from the general configuration are invisible to common users. Only users with special privileges can modify these parameters by running internal commands. For more information, see Internal and inherited parameters.

• In-memory parameters

  Modifications to these parameters take effect only once. For more information, see In-memory parameters.

Notice

For all parameters of the time type (which may be in the unit of μs, ms, s, m, h, or d and is case insensitive and with the default unit of s) and capacity type (which may be in the unit of B, byte, KB, K, MB, M, GB, G, TB, T, PB, or P and is case insensitive and with the default unit of MB) within a valid value range of [0,xxx], if you set the value to a negative number when you update the configuration, the query result returned for the show proxyconfig command in the ODP or a query on the ob_all_proxy_config table is also a negative number. However, the ODP takes the value as 0.

Modify configuration parameters

You modify the ODP configurations in either of the following ways:

• Run the following command to modify the configuration parameters when ODP is started:

  -o <var_name> = <var_value>
  

• When ODP is running, log on to ODP with the root@proxysys account and run the following command:

  ALTER proxyconfig SET <var_name> = <var_value>