Parameters Related to the Efficient Data Compression Algorithm

pca_shared_buffers

Parameter description: Similar to shared_buffers, this parameter is used to set the size of the page compression block address mapping management buffer.

This parameter is a POSTMASTER parameter. Set it based on instructions provided in Table 1.

Value range: 64 KB to 16 GB.

• If the value is less than 64 KB, an error is reported.
• If the value is greater than 16 GB, the parameter can be set successfully. However, in actual running, the automatic memory running is set to 16 GB.
• If the parameter does not contain a unit, the default value is 8 KB (the size of a page is 8 KB) multiplied by the parameter value.

Default value: 64 KB