Increase directory size calculation timeout

[themoosman]

After upgrading to a recent version, I keep seeing this warning. Is there a way to increase that timeout a bit? I checked the doc and can't find one for this. I realize it's just a warning, but it also means something isn't getting completed.

{"timestamp":"2026-04-21T11:37:13.940137Z","level":"WARN","fields":{"message":"Directory size calculation timeout after 197983 files, elapsed: 15.021042422s, timeout: 15s"},"target":"rustfs_object_capacity::scan","filename":"crates/object-capacity/src/scan.rs","line_number":362,"threadName":"rustfs-worker","threadId":"ThreadId(84)"}
{"timestamp":"2026-04-21T11:37:13.940430697Z","level":"WARN","fields":{"message":"Failed to get size for directory /rustfs/data0: Custom { kind: TimedOut, error: \"Timeout after 197983 files\" }"},"target":"rustfs_object_capacity::scan","filename":"crates/object-capacity/src/scan.rs","line_number":162,"threadName":"rustfs-worker","threadId":"ThreadId(38)"}

{"timestamp":"2026-04-21T11:47:13.920233676Z","level":"WARN","fields":{"message":"Directory size calculation timeout after 160769 files, elapsed: 15.000590839s, timeout: 15s"},"target":"rustfs_object_capacity::scan","filename":"crates/object-capacity/src/scan.rs","line_number":362,"threadName":"rustfs-worker","threadId":"ThreadId(96)"}
{"timestamp":"2026-04-21T11:47:13.920528904Z","level":"WARN","fields":{"message":"Failed to get size for directory /rustfs/data0: Custom { kind: TimedOut, error: \"Timeout after 160769 files\" }"},"target":"rustfs_object_capacity::scan","filename":"crates/object-capacity/src/scan.rs","line_number":162,"threadName":"rustfs-worker","threadId":"ThreadId(30)"}

{"timestamp":"2026-04-21T11:49:13.922240686Z","level":"WARN","fields":{"message":"Directory size calculation timeout after 187393 files, elapsed: 15.003573476s, timeout: 15s"},"target":"rustfs_object_capacity::scan","filename":"crates/object-capacity/src/scan.rs","line_number":362,"threadName":"rustfs-worker","threadId":"ThreadId(115)"}
{"timestamp":"2026-04-21T11:49:13.922452987Z","level":"WARN","fields":{"message":"Failed to get size for directory /rustfs/data0: Custom { kind: TimedOut, error: \"Timeout after 187393 files\" }"},"target":"rustfs_object_capacity::scan","filename":"crates/object-capacity/src/scan.rs","line_number":162,"threadName":"rustfs-worker","threadId":"ThreadId(21)"}

[For8stt]

Looks like this timeout is currently hardcoded to 15s in the capacity scanner.

So afaik there is no config/env option to increase it yet. The warning means RustFS stopped the directory size scan before finishing, after walking ~160k-200k files.

For now the only real options seem to be:

• ignore the warning if capacity stats are not critical
• reduce the number of files under that data dir
• patch the timeout in code
• add a config/env option for this timeout

Imo it would be useful to expose this as a setting, something like:

RUSTFS_CAPACITY_SCAN_TIMEOUT=60s

or similar.

Because on large datasets / many small files, 15s can be too aggressive and the capacity scan will basically never complete.

So yeah, not sure you’re doing anything wrong. Looks more like the timeout should be configurable.