しかしさすがに困ったので社内の神様にお伺いをたてたら以下のような解を頂きました。
ありがたや、ありがたやです。
[root@hogehone db]# pwd
/var/db
[root@hogehoge db]# /usr/sausalito/db4/bin/db_stat -c
684658 Last allocated locker ID.
9 Number of lock modes.
1000 Maximum number of locks possible.
1000 Maximum number of lockers possible.
1000 Maximum number of objects possible.
41032 Current locks.
41032 Maximum number of locks so far.
1000 Current number of lockers.
1000 Maximum number lockers so far.
1 Current number lock objects.
5 Maximum number of lock objects so far.
2046671 Number of lock requests.
2045671 Number of lock releases.
0 Number of lock requests that would have waited.
9119 Number of lock conflicts.
0 Number of deadlocks.
0 Number of transaction timeouts.
0 Number of lock timeouts.
352KB Lock region size (360448 bytes).
25 The number of region locks granted after waiting.
8570728 The number of region locks granted without waiting.
ロックの解放が上手くできなかったので、力技で対処しました。
[root@hogehoge db]# mkdir a
[root@hogehoge db]# mv __db.00* a
[root@hogehoge db]# /usr/sausalito/db4/bin/db_stat -c
12 Last allocated locker ID.
9 Number of lock modes.
1000 Maximum number of locks possible.
1000 Maximum number of lockers possible.
1000 Maximum number of objects possible.
0 Current locks.
3 Maximum number of locks so far.
0 Current number of lockers.
3 Maximum number lockers so far.
0 Current number lock objects.
3 Maximum number of lock objects so far.
36 Number of lock requests.
36 Number of lock releases.
0 Number of lock requests that would have waited.
0 Number of lock conflicts.
0 Number of deadlocks.
0 Number of transaction timeouts.
0 Number of lock timeouts.
352KB Lock region size (360448 bytes).
0 The number of region locks granted after waiting.
152 The number of region locks granted without waiting.