SFM0428I Dataspace buffer utilization is n%; suspending buffer flush.
SFM0428W Dataspace buffer utilization is n%; suspending activity updates.
SFM0428W Dataspace buffer utilization is n%; entering minimal collection period.
SFM0428I Dataspace buffer utilization is n%; resuming buffer flush.
SFM0428I Dataspace buffer utilization is n%; resuming activity updates.
SFM0428I Dataspace buffer utilization is n%; resuming full collection.
Explanation: Message SFM0428 is issued when buffer space in the VFTP dataspace is constrained. As buffer space begins to fill, VFTP begins to change its buffer management strategy in order to conserve space. If space constraint becomes critical, VFTP will begin to throttle back on its data collection in order to avoid losing critical FTP transfer and session data. The sequence works in the following way:
- When the dataspace buffers reach 5% of capacity, VFTP stops flushing buffer segments. Each individual buffer segment will be filled before being consumed from the dataspace buffers and written to the database. This has the effect of slowing updates to the database, but uses the dataspace buffers more efficiently. When the buffer utilization falls below 2%, buffer flush is resumed.
- When the dataspace buffers reach 15% of capacity, VFTP stops writing activity updates. Sessions and transfers will not be updated while active. Completion data will still be written. When the buffer utilization falls below 15%, activity updates are resumed.
- When the dataspace buffers reach 25% of capacity, VFTP enters minimal collection mode. Message log records and session log records are dropped in order to preserve buffer space for critical transfer data. When the buffer utilization falls below 20%, minimal collection mode ceases.
Action: VFTP dataspace buffer constraint is usually caused by a communication problem between the agent and the VFTP database server. Ensure that the database server is running and that the agent is able to communicate with it. If these messages appear frequently, increase the size of the dataspace buffer using the agent configuration dialog of the VFTP user interface. VFTP is able to survive a period of database outage without losing data. When the database come back online, the VFTP agent will re-establish communications and begin writing its backlog of buffered data.