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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
Administrator's ReferenceThe includes comprehensive descriptions of HCL Informix® configuration parameters, the system-monitoring interface (SMI) tables in the sysmaster database, the syntax of database server utilities such as onmode and onstat, logical-log records, disk structures, event alarms, and unnumbered error messages.
Administrative Utilities
The onstat utilityThe onstat utility reads shared-memory structures and provides statistics about the database server at the time that the command runs.
onstat -g monitoring optionsThe options that you can use with onstat -g command are used for support and debugging only. You can include only one of these options in the onstat -g command.
onstat -g rah command: Print read-ahead request statisticsUse the onstat -g rah command to display information about read-ahead requests.
onstat -g rah command: Section 6 Thread Read Ahead StatisticsThis section displays cumulative information for all active threads involved with read-ahead operations.

onstat -g rah command: Section 6 Thread Read Ahead Statistics

This section displays cumulative information for all active threads involved with read-ahead operations.

The meaning of each column in the output is the same as that documented for Section 5: Partition ReadAhead Statistics. This output breaks the information down by thread rather than by partition.

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