-L LEVEL `medium', or `full' (default: full)
--all index all configured inboxes
--jobs=NUM set or disable parallelization (NUM=0)
--batch-size=BYTES flush changes to OS after a given number of bytes
--max-size=BYTES do not index messages larger than the given size
--gc perform garbage collection instead of indexing
-L LEVEL `medium', or `full' (default: full)
--all index all configured inboxes
--jobs=NUM set or disable parallelization (NUM=0)
--batch-size=BYTES flush changes to OS after a given number of bytes
--max-size=BYTES do not index messages larger than the given size
--gc perform garbage collection instead of indexing