runtime_bloom_filter_max_size

Description

The runtime_bloom_filter_max_size variable specifies the maximum memory usage of the Runtime Bloom Filter, in bytes.

Privilege requirements

• Query variables

  • Global level

    Users in the sys tenant and all user tenants can execute the SHOW VARIABLES statement or view the SYS.TENANT_VIRTUAL_GLOBAL_VARIABLE view (in Oracle mode) and the information_schema.GLOBAL_VARIABLES view (in MySQL mode) to query the values of global system variables.

  • Session level

    Users in the sys tenant and all user tenants can execute the SHOW VARIABLES statement or view the SYS.TENANT_VIRTUAL_SESSION_VARIABLE view (in Oracle mode) and the information_schema.SESSION_VARIABLES view (in MySQL mode) to query the values of session system variables.

• Modify variables

  • Set the variable at the global level

    • Users in the sys tenant can directly modify the value of a global system variable.

    • MySQL users in a user tenant must have the SUPER or ALTER SYSTEM privilege to modify the value of a global system variable.

    • Oracle users in a user tenant of V4.x must have the ALTER SYSTEM privilege to modify the value of a global system variable, starting from V4.2.0.

  • Set the variable at the session level

    Users in the sys tenant and all user tenants can directly modify the value of a session system variable in their own tenant.

Attributes

Examples

set runtime_bloom_filter_max_size = 2 * 1024 * 1024 * 1024;

set global runtime_bloom_filter_max_size = 20 * 1024 * 1024;