Kernel Variant 
Kernel variants are different variants of the kernel of the database system. They differ in terms of which logging and runtime checks the database system performs during operation.
When the database is started, restarted, transferred to the ADMIN operational state, or transferred to the ONLINE operational state, you can specify explicitly which kernel variant you want to use.
Kernel Variant |
Description |
|---|---|
fast |
System default Fastest kernel variant, with minimum logging and runtime checks |
slow |
Kernel variant with extensive logging and runtime checks Do not use this kernel variant during production operation of the database. |
test |
Kernel variant that was developed especially for test purposes Do not use this kernel variant during production operation of the database. |