This object, used only when accounting data is stored to local disk, sets the maximum size in Kbytes an accounting file can grow to before it's closed, compressed, and moved to the outgoing directory for external pickup. An admin tunes this to balance how often files get rotated, smaller files rotate and get picked up more frequently, useful for timely billing, against per-file processing overhead from more frequent compression and handoff cycles. Setting this object to 5000 (5MB) means each disk-based accounting file gets closed and compressed for pickup once it reaches roughly 5MB, rather than growing indefinitely.