suggest to change default value of wal_ttl or tell storage to delete when bulk write is ready.

[whitewum]

86400 is too long to recycle in most cases.

while wal takes too many disk space (even larger than data-dir)

or

you can tell storage to delete (most) wal when bulk write is finished (since it's no longer in need).

Disk side is sensitive in some poc cases. (SSD is a bit expensive to them)

[CPWstatic]

The default value is now 14400.

[critical27]

We'd better update wal to a smaller value when bulk write. Maybe it won't worth to add an extra command to delete wals.