本文介紹PolarDB MySQL版的標準版的計算節點規格信息。
產品子系列
標準版的計算節點規格支持兩種子系列：通用規格和獨享規格。
通用規格：同一服務器上的不同集群，會互相充分利用彼此空閑的計算資源（如CPU），通過復用計算資源享受規模紅利，性價比更高。
獨享規格：每個集群會獨占所分配到的計算資源（如CPU），而不會與同一服務器上的其他集群共享資源，性能更加穩定可靠。
計算節點規格
計算節點規格的部分性能參數因存儲類型的不同而有所差異。
ESSD云盤
CPU架構 | 規格代碼 | CPU和內存 | 最大存儲容量 | 默認最大連接數1 | 文件系統最大inode數2 | 文件系統最大blktag數3 | 最大IOPS和吞吐量4 |
X86（通用規格） | polar.mysql.g1.tiny.c | 1核1 GB | 32 TB | 1,000 | 6,707,200 | 8,384,000 |
|
polar.mysql.g1.small.c | 1核2 GB | 32 TB | 2,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g2.small.c | 2核4 GB | 32 TB | 2,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g4.medium.c | 2核8 GB | 32 TB | 2,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g8.medium.c | 2核16 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g2.large.c | 4核8 GB | 32 TB | 3,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g4.large.c | 4核16 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g8.large.c | 4核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g2.xlarge.c | 8核16 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g4.xlarge.c | 8核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g8.xlarge.c | 8核64 GB | 32 TB | 16,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g2.2xlarge.c | 16核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g4.2xlarge.c | 16核64 GB | 32 TB | 16,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g8.2xlarge.c | 16核128 GB | 32 TB | 16,000 | 6,707,200 | 8,384,000 | ||
X86（獨享規格） | polar.mysql.x4.medium.c | 2核8 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | |
polar.mysql.x8.medium.c | 2核16 GB | 32 TB | 8,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x2.large.c | 4核8 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x4.large.c | 4核16 GB | 32 TB | 8,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x8.large.c | 4核32 GB | 32 TB | 8,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x2.xlarge.c | 8核16 GB | 32 TB | 8,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x4.xlarge.c | 8核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x8.xlarge.c | 8核64 GB | 32 TB | 16,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x2.2xlarge.c | 16核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x4.2xlarge.c | 16核64 GB | 32 TB | 32,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x8.2xlarge.c | 16核128 GB | 32 TB | 32,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x2.4xlarge.c | 32核64 GB | 32 TB | 32,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x4.4xlarge.c | 32核128 GB | 32 TB | 64,000 | 104,857,600 | 131,072,000 | ||
polar.mysql.x8.4xlarge.c | 32核256 GB | 32 TB | 64,000 | 104,857,600 | 131,072,000 | ||
polar.mysql.x4.8xlarge.c | 64核256 GB | 32 TB | 64,000 | 104,857,600 | 131,072,000 | ||
polar.mysql.x8.8xlarge.c | 64核512 GB | 32 TB | 64,000 | 104,857,600 | 131,072,000 | ||
倚天ARM（通用規格） | polar.mysql.g1m.tiny.c | 1核1 GB | 32 TB | 1,000 | 6,707,200 | 8,384,000 | |
polar.mysql.g1m.small.c | 1核2 GB | 32 TB | 2,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g2m.small.c | 2核4 GB | 32 TB | 2,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g4m.medium.c | 2核8 GB | 32 TB | 2,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g8m.medium.c | 2核16 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g2m.large.c | 4核8 GB | 32 TB | 3,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g4m.large.c | 4核16 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g8m.large.c | 4核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g2m.xlarge.c | 8核16 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g4m.xlarge.c | 8核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g8m.xlarge.c | 8核64 GB | 32 TB | 16,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g2m.2xlarge.c | 16核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g4m.2xlarge.c | 16核64 GB | 32 TB | 16,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.g8m.2xlarge.c | 16核128 GB | 32 TB | 16,000 | 6,707,200 | 8,384,000 | ||
倚天ARM（獨享規格） | polar.mysql.x4m.medium.c | 2核8 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | |
polar.mysql.x8m.medium.c | 2核16 GB | 32 TB | 8,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x2m.large.c | 4核8 GB | 32 TB | 6,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x4m.large.c | 4核16 GB | 32 TB | 8,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x8m.large.c | 4核32 GB | 32 TB | 8,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x2m.xlarge.c | 8核16 GB | 32 TB | 8,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x4m.xlarge.c | 8核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x8m.xlarge.c | 8核64 GB | 32 TB | 16,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x2m.2xlarge.c | 16核32 GB | 32 TB | 10,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x4m.2xlarge.c | 16核64 GB | 32 TB | 32,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x8m.2xlarge.c | 16核128 GB | 32 TB | 32,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x2m.4xlarge.c | 32核64 GB | 32 TB | 32,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x4m.4xlarge.c | 32核128 GB | 32 TB | 64,000 | 6,707,200 | 8,384,000 | ||
polar.mysql.x8m.4xlarge.c | 32核256 GB | 32 TB | 64,000 | 6,707,200 | 8,384,000 |
默認最大連接數1
表格中展示的最大連接數為默認值。您可以在控制臺通過修改max_connections參數來調整集群實際的最大連接數，該參數的取值范圍為1-200000。關于如何修改集群參數，請參見設置集群參數。
文件系統最大inode數2、文件系統最大blktag數3
PolarDB標準版存儲層使用ESSD云盤，ESSD云盤有inode和blktag的概念。簡單理解，一個inode對應一個文件，一個blktag對應塊存儲上一段4 MB的邏輯空間。inode和blktag數量，與存儲盤的容量是線性相關，比如10 GB的盤，最多有2,048個inode和2,560個blktag。容量、inode或blktag任意一個指標到達規格上限，用戶都需要升級規格。
容量單位換算關系如下：
1 TB=1,024 GB
1 GB=1,024 MB
1 MB=1,024 KB
1 KB=1,024 Byte
最大IOPS和吞吐量4
最大IOPS和吞吐量為理論最大值，并不能保證在任何條件下都可以達到標稱最大值，通常會受限于所購買的云盤空間大小。
ESSD AutoPL云盤的初始IOPS為50,000，您可在購買時配置AutoPL云盤預配置IOPS，或變更ESSD云盤性能，提高其IOPS上限，最大總IOPS為100,000。
關于ESSD云盤的性能詳情，請參見ESSD云盤和ESSD AutoPL云盤。
ESSD云盤的IOPS和吞吐量是多個節點之間共享的。例如，若集群的計算節點規格為8核32 GB，存儲類型為ESSD PL1云盤，數據庫節點包含1個讀寫節點和3個只讀節點，那么這4個節點將共享一份存儲性能。也就是說，4個節點的總IOPS不能超過ESSD PL1的性能上限50,000 IOPS，總吞吐量不能超過350 MB/s。此外，是否能達到ESSD PL1云盤的性能上限還取決于購買的云盤空間大小。
PSL4/PSL5
CPU架構 | 規格代碼 | CPU和內存 | 最大存儲容量 | 默認最大連接數1 | 文件系統最大inode數2 | 文件系統最大blktag數3 | PSL4最大IOPS4 | PSL5最大IOPS4 | I/O帶寬 |
X86（通用規格） | polar.mysql.g1.tiny.c | 1核1 GB | 100 TB | 1,000 | 20,971,520 | 26,214,400 | 1,500 | 3,000 | 1 Gbps |
polar.mysql.g1.small.c | 1核2 GB | 100 TB | 1,500 | 20,971,520 | 26,214,400 | 1,700 | 3,400 | 1 Gbps | |
polar.mysql.g2.small.c | 2核4 GB | 100 TB | 1,800 | 20,971,520 | 26,214,400 | 4,000 | 8,000 | 1 Gbps | |
polar.mysql.g4.medium.c | 2核8 GB | 100 TB | 2,000 | 20,971,520 | 26,214,400 | 8,000 | 16,000 | 1 Gbps | |
polar.mysql.g8.medium.c | 2核16 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 18,000 | 36,000 | 2 Gbps | |
polar.mysql.g2.large.c | 4核8 GB | 100 TB | 3,000 | 20,971,520 | 26,214,400 | 15,000 | 30,000 | 2 Gbps | |
polar.mysql.g4.large.c | 4核16 GB | 100 TB | 6,000 | 20,971,520 | 26,214,400 | 21,000 | 42,000 | 2 Gbps | |
polar.mysql.g8.large.c | 4核32 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 36,000 | 72,000 | 4 Gbps | |
polar.mysql.g2.xlarge.c | 8核16 GB | 100 TB | 6,000 | 20,971,520 | 26,214,400 | 18,000 | 36,000 | 2 Gbps | |
polar.mysql.g4.xlarge.c | 8核32 GB | 100 TB | 10,000 | 20,971,520 | 26,214,400 | 27,000 | 54,000 | 4 Gbps | |
polar.mysql.g8.xlarge.c | 8核64 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 54,000 | 108,000 | 10 Gbps | |
polar.mysql.g2.2xlarge.c | 16核32 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 31,500 | 63,000 | 4 Gbps | |
polar.mysql.g4.2xlarge.c | 16核64 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 31,500 | 63,000 | 4 Gbps | |
polar.mysql.g8.2xlarge.c | 16核128 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 31,500 | 63,000 | 8 Gbps | |
X86（獨享規格） | polar.mysql.x4.medium.c | 2核8 GB | 100 TB | 6,000 | 20,971,520 | 26,214,400 | 8,000 | 16,000 | 1 Gbps |
polar.mysql.x8.medium.c | 2核16 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 18,000 | 36,000 | 2 Gbps | |
polar.mysql.x2.large.c | 4核8 GB | 100 TB | 3,000 | 20,971,520 | 26,214,400 | 15,000 | 30,000 | 2 Gbps | |
polar.mysql.x4.large.c | 4核16 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 32,000 | 64,000 | 4 Gbps | |
polar.mysql.x8.large.c | 4核32 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 36,000 | 72,000 | 4 Gbps | |
polar.mysql.x2.xlarge.c | 8核16 GB | 100 TB | 6,000 | 20,971,520 | 26,214,400 | 18,000 | 36,000 | 2 Gbps | |
polar.mysql.x4.xlarge.c | 8核32 GB | 100 TB | 10,000 | 20,971,520 | 26,214,400 | 48,000 | 96,000 | 8 Gbps | |
polar.mysql.x8.xlarge.c | 8核64 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 50,000 | 108,000 | 10 Gbps | |
polar.mysql.x2.2xlarge.c | 16核32 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 50,000 | 63,000 | 4 Gbps | |
polar.mysql.x4.2xlarge.c | 16核64 GB | 100 TB | 32,000 | 20,971,520 | 26,214,400 | 50,000 | 192,000 | 16 Gbps | |
polar.mysql.x8.2xlarge.c | 16核128 GB | 100 TB | 32,000 | 20,971,520 | 26,214,400 | 50,000 | 192,000 | 16 Gbps | |
polar.mysql.x2.4xlarge.c | 32核64 GB | 100 TB | 32,000 | 20,971,520 | 26,214,400 | 50,000 | 192,000 | 16 Gbps | |
polar.mysql.x4.4xlarge.c | 32核128 GB | 500 TB | 64,000 | 104,857,600 | 131,072,000 | 80,000 | 288,000 | 20 Gbps | |
polar.mysql.x8.4xlarge.c | 32核256 GB | 500 TB | 64,000 | 104,857,600 | 131,072,000 | 80,000 | 288,000 | 24 Gbps | |
polar.mysql.x4.8xlarge.c | 64核256 GB | 500 TB | 64,000 | 104,857,600 | 131,072,000 | 100,000 | 288,000 | 24 Gbps | |
polar.mysql.x8.8xlarge.c | 64核512 GB | 500 TB | 100,000 | 104,857,600 | 131,072,000 | 100,000 | 288,000 | 24 Gbps | |
倚天ARM（通用規格） | polar.mysql.g1m.tiny.c | 1核1 GB | 100 TB | 1,000 | 20,971,520 | 26,214,400 | 1,500 | 3,000 | 1 Gbps |
polar.mysql.g1m.small.c | 1核2 GB | 100 TB | 1,500 | 20,971,520 | 26,214,400 | 1,700 | 3,400 | 1 Gbps | |
polar.mysql.g2m.small.c | 2核4 GB | 100 TB | 1,800 | 20,971,520 | 26,214,400 | 4,000 | 8,000 | 1 Gbps | |
polar.mysql.g4m.medium.c | 2核8 GB | 100 TB | 2,000 | 20,971,520 | 26,214,400 | 8,000 | 16,000 | 1 Gbps | |
polar.mysql.g8m.medium.c | 2核16 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 18,000 | 36,000 | 2 Gbps | |
polar.mysql.g2m.large.c | 4核8 GB | 100 TB | 3,000 | 20,971,520 | 26,214,400 | 15,000 | 30,000 | 2 Gbps | |
polar.mysql.g4m.large.c | 4核16 GB | 100 TB | 6,000 | 20,971,520 | 26,214,400 | 21,000 | 42,000 | 2 Gbps | |
polar.mysql.g8m.large.c | 4核32 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 36,000 | 72,000 | 4 Gbps | |
polar.mysql.g2m.xlarge.c | 8核16 GB | 100 TB | 6,000 | 20,971,520 | 26,214,400 | 18,000 | 36,000 | 2 Gbps | |
polar.mysql.g4m.xlarge.c | 8核32 GB | 100 TB | 10,000 | 20,971,520 | 26,214,400 | 27,000 | 54,000 | 4 Gbps | |
polar.mysql.g8m.xlarge.c | 8核64 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 54,000 | 108,000 | 10 Gbps | |
polar.mysql.g2m.2xlarge.c | 16核32 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 31,500 | 63,000 | 4 Gbps | |
polar.mysql.g4m.2xlarge.c | 16核64 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 31,500 | 63,000 | 4 Gbps | |
polar.mysql.g8m.2xlarge.c | 16核128 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 31,500 | 63,000 | 8 Gbps | |
倚天ARM（獨享規格） | polar.mysql.x4m.medium.c | 2核8 GB | 100 TB | 6,000 | 20,971,520 | 26,214,400 | 8,000 | 16,000 | 1 Gbps |
polar.mysql.x8m.medium.c | 2核16 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 18,000 | 36,000 | 2 Gbps | |
polar.mysql.x2m.large.c | 4核8 GB | 100 TB | 3,000 | 20,971,520 | 26,214,400 | 15,000 | 30,000 | 2 Gbps | |
polar.mysql.x4m.large.c | 4核16 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 32,000 | 64,000 | 4 Gbps | |
polar.mysql.x8m.large.c | 4核32 GB | 100 TB | 8,000 | 20,971,520 | 26,214,400 | 36,000 | 72,000 | 4 Gbps | |
polar.mysql.x2m.xlarge.c | 8核16 GB | 100 TB | 6,000 | 20,971,520 | 26,214,400 | 18,000 | 36,000 | 2 Gbps | |
polar.mysql.x4m.xlarge.c | 8核32 GB | 100 TB | 10,000 | 20,971,520 | 26,214,400 | 48,000 | 96,000 | 8 Gbps | |
polar.mysql.x8m.xlarge.c | 8核64 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 50,000 | 108,000 | 10 Gbps | |
polar.mysql.x2m.2xlarge.c | 16核32 GB | 100 TB | 16,000 | 20,971,520 | 26,214,400 | 50,000 | 63,000 | 4 Gbps | |
polar.mysql.x4m.2xlarge.c | 16核64 GB | 100 TB | 32,000 | 20,971,520 | 26,214,400 | 50,000 | 192,000 | 16 Gbps | |
polar.mysql.x8m.2xlarge.c | 16核128 GB | 100 TB | 32,000 | 20,971,520 | 26,214,400 | 50,000 | 192,000 | 16 Gbps | |
polar.mysql.x2m.4xlarge.c | 32核64 GB | 100 TB | 32,000 | 62,914,560 | 78,643,200 | 80,000 | 192,000 | 16 Gbps | |
polar.mysql.x4m.4xlarge.c | 32核128 GB | 100 TB | 64,000 | 104,857,600 | 131,072,000 | 80,000 | 288,000 | 20 Gbps | |
polar.mysql.x8m.4xlarge.c | 32核256 GB | 300 TB | 64,000 | 104,857,600 | 131,072,000 | 80,000 | 288,000 | 24 Gbps |
存儲類型為PSL4或PSL5的集群最大IOPS和I/O帶寬隨著節點數量的增加而成倍增加。例如，若集群的子系列為獨享規格，計算節點為8核32 GB，存儲類型為PSL5，數據庫節點包含1個讀寫節點和3個只讀節點，那么這4個節點總共可以獲得的最大存儲性能為：4*96000 IOPS，4*8 Gbps。
存儲類型為PSL4或PSL5的集群各個子集群擁有獨立的存儲規格，互不干擾。
例如，若購買的集群存儲規格的IOPS是96000，帶寬是8 Gbps，1個讀寫節點和3個只讀節點共4個子集群，那么每個子集群都擁有96000 IOPS和8 Gbps的帶寬，各個子集群之間是互不影響的。
若需調整最大存儲容量，請聯系我們進行技術支持評估。
默認最大連接數1
表格中展示的最大連接數為默認值。您可以在控制臺通過修改max_connections參數來調整集群實際的最大連接數，該參數的取值范圍為1-200000。關于如何修改集群參數，請參見設置集群參數。
文件系統最大inode數2、文件系統最大blktag數3
PolarDB通過自研分布式文件系統PolarFS訪問底層存儲，和傳統文件系統類似，PolarFS也有inode和blktag的概念。簡單理解，一個inode對應一個文件，一個blktag對應塊存儲上一段4 MB的邏輯空間。inode和blktag數量，跟存儲盤的容量是線性相關的，比如10 GB的盤，最多有2048個inode和2560個blktag。容量、inode或blktag任意一個指標到達規格上限，用戶都需要升級規格。
容量單位換算關系：
1 TB=1,024 GB
1 GB=1,024 MB
1 MB=1,024 KB
1 KB=1,024 Byte
最大IOPS4
最大IOPS為理論最大值，并不能保證在任何條件下都可以達到標稱最大值。