6.1.2 Oracle Linux KVM Deployment Specifications and Limits

This topic describes the deployment specifications and limits for using Oracle Linux KVM on Oracle Exadata Database Machine.

Table 6-1 Oracle Linux KVM Deployment Specifications and Limits for Exadata X10M

Attribute	Value for X10M
Maximum number of Oracle Linux KVM guests on each database server	Starting with Oracle Exadata System Software release 24.1.0: 50 With Oracle Exadata System Software release 23.1.X: 12
Total physical memory on each database server	Minimum: 512 GB Maximum: 3072 GB
Total available memory on each database server for all Oracle Linux KVM guests	Minimum: 440 GB Maximum: 2800 GB
Minimum memory limit for each Oracle Linux KVM guest	16 GB
Total CPU cores (vCPUs) on each database server	192 (384)
CPU core (vCPU) limits for each Oracle Linux KVM guest	Minimum: 2 (4) Maximum: 190 (380)
Over-provisioning limit for CPU cores (vCPUs) on each database server for all Oracle Linux KVM guests Note: CPU over-provisioning may cause performance conflicts.	380 (760) Note: CPU over-provisioning is not supported on servers containing 512 GB of RAM. CPU oversubscription for KVM guests is not permitted when capacity-on-demand is used on Exadata X10M KVM hosts. CPU oversubscription is only allowed on Exadata X10M when all CPU cores are active on the KVM hosts.
Total usable disk storage for Oracle Linux KVM guests on each database server	Minimum: 3.40 TB Maximum: 6.97 TB

Table 6-2 Oracle Linux KVM Deployment Specifications and Limits for Exadata X9M-2

Attribute	Value for X9M-2	Value for X9M-2 Eighth Rack
Maximum number of Oracle Linux KVM guests on each database server	12	4
Total physical memory on each database server	Minimum: 512 GB Maximum: 2048 GB	Minimum: 384 GB Maximum: 1024 GB
Total available memory on each database server for all Oracle Linux KVM guests	Minimum: 440 GB Maximum: 1870 GB	Minimum: 328 GB Maximum: 920 GB
Minimum memory limit for each Oracle Linux KVM guest	16 GB	16 GB
Total CPU cores (vCPUs) on each database server	64 (128)	32 (64)
CPU core (vCPU) limits for each Oracle Linux KVM guest	Minimum: 2 (4) Maximum: 62 (124)	Minimum: 2 (4) Maximum: 31 (62)
Over-provisioning limit for CPU cores (vCPUs) on each database server for all Oracle Linux KVM guests Note: CPU over-provisioning may cause performance conflicts.	124 (248)	62 (124)
Total usable disk storage for Oracle Linux KVM guests on each database server	Minimum: 3.40 TB Maximum: 6.97 TB	Minimum: 3.40 TB Maximum: 6.97 TB

Table 6-3 Oracle Linux KVM Deployment Specifications and Limits for Exadata X8M-2

Attribute	Value for X8M-2	Value for X8M-2 Eighth Rack
Maximum number of Oracle Linux KVM guests on each database server	12 Note: The limit is 8 on servers that contain 384 GB of RAM and are configured to support Exadata Secure RDMA Fabric Isolation.	4
Total physical memory on each database server	Minimum: 384 GB Maximum: 1536 GB	Minimum: 384 GB Maximum: 768 GB
Total available memory on each database server for all Oracle Linux KVM guests	Minimum: 328 GB Maximum: 1390 GB	Minimum: 328 GB Maximum: 660 GB
Minimum memory limit for each Oracle Linux KVM guest	16 GB	16 GB
Total CPU cores (vCPUs) on each database server	48 (96)	24 (48)
CPU core (vCPU) limits for each Oracle Linux KVM guest	Minimum: 2 (4) Maximum: 46 (92)	Minimum: 2 (4) Maximum: 23 (46)
Over-provisioning limit for CPU cores (vCPUs) on each database server for all Oracle Linux KVM guests Note: CPU over-provisioning may cause performance conflicts.	92 (184)	46 (92)
Total usable disk storage for Oracle Linux KVM guests on each database server	Minimum: 3.15 TB Maximum: 6.3 TB	Minimum: 3.15 TB Maximum: 6.3 TB

Note:

1 CPU core = 1 OCPU = 2 vCPUs = 2 hyper-threads

Table 6-4 Oracle Linux KVM Available Memory Limits

Total installed memory	DIMM configuration	Applicable Exadata database server models	Total available memory for Oracle Linux KVM guests
3072 GB	24 x 128 GB	X10M	2800 GB
2304 GB	24 x 96 GB	X10M	2090 GB
2048 GB	32 x 64 GB	X9M-2	1870 GB
1536 GB	24 x 64 GB	X10M X9M-2 X8M-2	1390 GB
1024 GB	16 x 64 GB	X9M-2 X9M-2 Eighth Rack	920 GB
768 GB	12 x 64 GB	X8M-2 X8M-2 Eighth Rack	660 GB
512 GB	16 x 32 GB	X10M X9M-2	440 GB
384 GB	12 x 32 GB	X9M-2 Eighth Rack X8M-2 X8M-2 Eighth Rack	328 GB