Downtime-Optimized Conversion

Handling Performance Issues in Phase PARRUN_SMIG_SFIN

Context

Due to small table buffer size for the temporary system, almost all database selects are ignoring the table buffer and execute a query on the database.

Procedure

  1. Stop the temporary system.
  2. Open the instance profile of the temporary system on OS-level: <DIR_PUT>/system/<SID>/SYSTMP/profile/<InstanceProfile>
  3. Delete the following parameters:

    • zcsa/table_buffer_area

    • zcsa/presentation_buffer_area

    • zcsa/db_max_buftab

    • rtbb/buffer_length

    • rtbb/max_tables

    Removing the parameters will enable the default setting for the temporary system.

  4. Start the temporary system.
  5. Repeat the phase.