ApsaraDB RDS for PostgreSQL now supports the general Enterprise SSD (ESSD) storage type, which uses next-generation storage architecture to reduce costs and improve I/O flexibility compared to standard ESSDs.
Feature description
General ESSDs are fully compatible with all ESSD features and add support for three optional capabilities: I/O acceleration, I/O burst, and data archiving.
| Feature | What it does | Best for |
|---|---|---|
| I/O acceleration | Expands the buffer pool to accelerate caching and improve read/write performance, reducing the impact of I/O jitter | Improving I/O performance without upgrading instance specifications or changing business code |
| I/O burst | Removes the IOPS ceiling so your instance can handle sudden spikes in I/O load | Workloads with heavy, fluctuating I/O patterns |
Effective date
June 20, 2024
Applicable services
ApsaraDB RDS for PostgreSQL
General ESSDs are not available when the Billing Method is set to Serverless.
Limitations
Storage capacity ranges from 10 GB to 64,000 GB.
Once you switch an instance to general ESSD, you cannot revert to a different storage type. You can, however, change from ESSD to general ESSD. For more information, see Manage general ESSDs.
Billing
General ESSD charges consist of four components:
General ESSD fee = Storage capacity fee + I/O burst fee + I/O acceleration fee + Data archiving fee
Storage capacity fee
The storage capacity fee follows the same billing rules as PL1 ESSDs and supports both subscription and pay-as-you-go billing. For pricing details, see Billable items.
In the following regions, the unit price of a general ESSD is lower than that of a PL1 ESSD:
China (Hong Kong), Singapore, Malaysia (Kuala Lumpur), Indonesia (Jakarta), Philippines (Manila), Thailand (Bangkok), Japan (Tokyo), South Korea (Seoul), US (Silicon Valley), US (Virginia), Germany (Frankfurt), UK (London), and UAE (Dubai)
The cost savings vary by billing method:
Pay-as-you-go: up to 60% more cost-effective than a PL1 ESSD
Subscription: up to 43% more cost-effective than a PL1 ESSD
In the following regions, the unit price of a general ESSD is the same as a PL1 ESSD:
China (Hangzhou), China (Shanghai), China (Beijing), China (Shenzhen), China (Nantong), China (Qingdao), China (Zhangjiakou), China (Hohhot), China (Ulanqab), China (Heyuan), China (Guangzhou), and China (Chengdu)
Optional feature fees
Each optional feature is billed separately when enabled. For billing details, see:
What's next
General ESSDs — overview and key concepts
Manage general ESSDs — switch storage types and manage settings