PolarDB:FAQ about storage billing

• If the storage class is PSL4 or PSL5:

  • With the pay-as-you-go billing method, you do not need to specify a maximum storage capacity. You are charged hourly based on your actual usage.

  • With the subscription billing method, you must specify a maximum storage capacity and pay the fees upfront.

  Note

  For the PSL4 and PSL5 storage classes, the storage space automatically scales based on the amount of data stored. No additional operations are required.

• If the storage class is ESSD:

  • With the pay-as-you-go billing method, you must specify a maximum storage capacity and are charged hourly.

  • With the subscription billing method, you must specify a maximum storage capacity and pay the fees upfront.

  Note

  If you use the ESSD storage class, insufficient storage space may cause data write failures and affect your services.

You cannot switch only the storage billing method. For more information, see Switch billing methods.

If you enable the hot standby storage cluster feature when you purchase a cluster, you cannot disable it later. We recommend that you carefully consider this option during purchase. For more information, see High-availability Mode (Hot Standby Cluster).

1. Log on to the PolarDB console and set the loose_recycle_bin parameter to OFF to disable the table recycle bin feature. For more information, see Set cluster and node parameters.

2. Execute the call dbms_recycle.purge_table('TABLE_NAME') statement to manually clear tables from the recycle bin. For more information, see Manage the recycle bin.

Charges for a hot standby storage cluster are based on the associated bucket. Enabling this feature when you purchase a cluster doubles the unit price of the associated bucket. For more information, see Bucket.

If your cluster uses the ESSD storage class, the disk is locked and becomes read-only when its storage space is full. A 3 GB buffer is reserved to prevent data corruption from a full disk. You can configure automatic storage scaling for ESSDs or manually scale out the storage capacity.