Table 26 lists the ONCONFIG parameters that set shared-memory performance options. For more information, see the chapter on configuration parameters in the IBM Informix Dynamic Server Administrator's Reference.
| Configuration Parameter | Purpose |
|---|---|
| CKPTINTVL | Specifies the maximum number of seconds that can elapse before the database server checks if a checkpoint is needed |
| CLEANERS | Specifies the number of page-cleaner threads that the database server is to run |
| RA_PAGES | Specifies the number of disk pages that the database server should attempt to read ahead when it performs sequential scans of data or index records |
| RA_THRESHOLD | Specifies the number of unprocessed memory pages that, after they are read, cause the database server to read ahead on disk |