OPTIMIZE TABLE cabinet;
+------------------+----------+----------+----------+
| Table            | Op       | Msg_type | Msg_text |
+------------------+----------+----------+----------+
| nebulous.cabinet | optimize | status   | OK       | 
+------------------+----------+----------+----------+
1 row in set (2.39 sec)

OPTIMIZE TABLE deleted;
+------------------+----------+----------+----------+
| Table            | Op       | Msg_type | Msg_text |
+------------------+----------+----------+----------+
| nebulous.deleted | optimize | status   | OK       | 
+------------------+----------+----------+----------+
1 row in set (15.25 sec)

OPTIMIZE TABLE directory;
+--------------------+----------+----------+----------+
| Table              | Op       | Msg_type | Msg_text |
+--------------------+----------+----------+----------+
| nebulous.directory | optimize | status   | OK       | 
+--------------------+----------+----------+----------+
1 row in set (14 min 56.96 sec)

OPTIMIZE TABLE lock_record;
+----------------------+----------+----------+----------+
| Table                | Op       | Msg_type | Msg_text |
+----------------------+----------+----------+----------+
| nebulous.lock_record | optimize | status   | OK       | 
+----------------------+----------+----------+----------+
1 row in set (1.30 sec)

OPTIMIZE TABLE log;
+--------------+----------+----------+----------+
| Table        | Op       | Msg_type | Msg_text |
+--------------+----------+----------+----------+
| nebulous.log | optimize | status   | OK       | 
+--------------+----------+----------+----------+
1 row in set (1.28 sec)

OPTIMIZE TABLE mountedvol;
+---------------------+----------+----------+----------+
| Table               | Op       | Msg_type | Msg_text |
+---------------------+----------+----------+----------+
| nebulous.mountedvol | optimize | status   | OK       | 
+---------------------+----------+----------+----------+
1 row in set (1.33 sec)

OPTIMIZE TABLE volume;
+-----------------+----------+----------+----------+
| Table           | Op       | Msg_type | Msg_text |
+-----------------+----------+----------+----------+
| nebulous.volume | optimize | status   | OK       | 
+-----------------+----------+----------+----------+
1 row in set (1.33 sec)

OPTIMIZE TABLE storage_object_xattr;
+-------------------------------+----------+----------+----------+
| Table                         | Op       | Msg_type | Msg_text |
+-------------------------------+----------+----------+----------+
| nebulous.storage_object_xattr | optimize | status   | OK       | 
+-------------------------------+----------+----------+----------+
1 row in set (37 min 55.83 sec)

OPTIMIZE TABLE storage_object_attr;
+------------------------------+----------+----------+----------+
| Table                        | Op       | Msg_type | Msg_text |
+------------------------------+----------+----------+----------+
| nebulous.storage_object_attr | optimize | status   | OK       | 
+------------------------------+----------+----------+----------+
1 row in set (1 hour 9 min 55.56 sec)

Not performed:
OPTIMIZE TABLE storage_object;
OPTIMIZE TABLE instance;