Summary information |
|
|---|---|
Default value |
1000 |
Range of values |
1–2147483647 |
Status |
Dynamic |
Display level |
Comprehensive |
Required role |
System Administrator |
i/o accounting flush interval specifies the amount of time, in machine clock ticks, that Adaptive Server waits before flushing I/O statistics for each user from sysprocesses to syslogins. This is used for chargeback accounting.
When a user logs in to Adaptive Server, the server begins accumulating I/O statistics for that user process in sysprocesses. When the value of i/o accounting statistics interval is exceeded, or a user logs off Adaptive Server, the accumulated I/O statistics for that user are flushed from sysprocesses to syslogins. These statistics continue accumulating in syslogins until you clear the totals by using sp_clearstats. You display the current totals from syslogins by using sp_reportstats.
The value to which you set i/o accounting flush interval depends on the type of reporting you intend to do. If you intend to run reports on a monthly basis, i/o accounting flush interval to a relatively high value. This is because, with infrequent reporting, it is less critical that the data in syslogins be updated frequently.
If you intend to do periodic ad hoc selects on the totio column syslogins to determine I/O volume by process, to set i/o accounting flush interval to a lower value. Doing so increases the likelihood of the data in syslogins being up to date when you execute your selects.
If you do not intend to report on I/O statistics at all, set i/o accounting flush interval to its maximum value. This reduces the number of times syslogins is updated and the number of times its pages need to be written to disk.
