General
Q: What's the difference between MODS Regular and MODS Highend?
A: MODS Regular is based on Oracle PCA and ZFSA platform; MODS Highend is based on Oracle Exadata systems. See the following table for the main differences:
| FEATURE | MODS Regular | MODS Highend |
|---|---|---|
| Platform | Oracle PCA | Oracle Exadata |
| Oracle Edition | EE and SE2 | EE |
| High Availability Architecture | Data Guard; Standby DB | RAC and Data Guard |
| Storage | Oracle ZFSSA | Exadata Storage Cells |
Table: MODS feature comparison
Q: What Oracle releases are available on the MODS Regular platform?
A: MODS Regular supports Oracle 19c and newer. See Oracle Releases for details.
Q: How is storage managed on MODS Regular?
A: MODS Regular databases files are stored and managed on the Oracle ZFS Storage Appliance (ZFSSA). The goal is to have a controlled way of space allocation per VM on the ZFSSA based on pre-defined quotas per file system. In order to avoid storage overload, space quotas for new database deployments are in place. The file systems are permanently monitored by OEM, and the quotas will be automatically resized in case of space pressure.
Q: Is it possible to increase the parameter processes?
A: This is only possible by a service request.
The default value depends on the number of vCPUs. E.g. minimal value: 4 vCPUs * 250 = 1000.
Q: Is there an option to change the SGA/PGA settings?
A: No.
The rate of SGA/PGA allocation is fix:
- SGA: 60% of host memory (8GB per vCPU)
- PGA: 12% of host memory