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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 Variants

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 which was developed especially for test purposes

Do not use this kernel variant during production operation of the database.

More Information

Database Studio, Starting or Stopping Databases

Database Manager CLI, db_speed