too many wal files on rocksdb-4.12

[malexzx]

I try to migrate from rocksdb-4.3 to rocksdb-4.12.
After 24 hours of my app work on new code,
rocksdb has prodused too many WAL files. (compared with rocksdb-4.3).
WAL directory configured to work separate with options.wal_dir
Also dbopen stay slower.
After run previous version app (with rocksdb-4.3) log files
redused to few and startup doing so fast.

Please advice, how to update my code to work around this problem. (Or it is a db bug?)
Log files from db attached:
LOG.4.12.txt
LOG.4.3.0.txt

ls -l (on 4.12)
-rw-rw-r--. 1 user user 861 Sep 14 11:35 000003.log
-rw-rw-r--. 1 user user 138346 Sep 14 11:37 000017.log
-rw-rw-r--. 1 user user 43157 Sep 14 12:03 000021.log
-rw-rw-r--. 1 user user 0 Sep 14 12:05 000027.log
-rw-rw-r--. 1 user user 9853 Sep 14 12:08 000030.log
-rw-rw-r--. 1 user user 6085 Sep 14 12:10 000036.log
-rw-rw-r--. 1 user user 6085 Sep 14 12:16 000043.log
-rw-rw-r--. 1 user user 645 Sep 14 12:19 000047.log
-rw-rw-r--. 1 user user 51467 Sep 14 12:23 000051.log
-rw-rw-r--. 1 user user 3060 Sep 14 12:25 000060.log
-rw-rw-r--. 1 user user 14724 Sep 14 12:31 000068.log
-rw-rw-r--. 1 user user 26363 Sep 14 12:31 000072.log
-rw-rw-r--. 1 user user 3499 Sep 14 12:33 000081.log
-rw-rw-r--. 1 user user 3541 Sep 14 12:34 000085.log
-rw-rw-r--. 1 user user 166086 Sep 14 13:42 000089.log
-rw-rw-r--. 1 user user 20791 Sep 14 13:47 000098.log
-rw-rw-r--. 1 user user 1023468 Sep 14 15:15 000102.log
-rw-rw-r--. 1 user user 41594 Sep 14 15:16 000108.log
-rw-rw-r--. 1 user user 29829 Sep 14 15:19 000117.log
-rw-rw-r--. 1 user user 244358 Sep 14 15:24 000121.log
-rw-rw-r--. 1 user user 38215 Sep 14 15:27 000126.log
-rw-rw-r--. 1 user user 202870 Sep 14 15:35 000133.log
-rw-rw-r--. 1 user user 412206 Sep 14 15:44 000137.log
-rw-rw-r--. 1 user user 838326 Sep 14 15:59 000142.log
-rw-rw-r--. 1 user user 127082 Sep 14 17:03 000149.log
-rw-rw-r--. 1 user user 56140811 Sep 15 08:52 000155.log
-rw-rw-r--. 1 user user 23030 Sep 15 08:53 000165.log
-rw-rw-r--. 1 user user 0 Sep 15 08:54 000172.log
-rw-rw-r--. 1 user user 11015549 Sep 15 12:00 000175.log
-rw-rw-r--. 1 user user 0 Sep 15 12:08 000181.log
-rw-rw-r--. 1 user user 0 Sep 15 12:14 000187.log
-rw-rw-r--. 1 user user 0 Sep 15 12:23 000190.log
-rw-rw-r--. 1 user user 0 Sep 15 12:25 000193.log
-rw-rw-r--. 1 user user 0 Sep 15 12:33 000196.log
-rw-rw-r--. 1 user user 0 Sep 15 12:34 000199.log
-rw-rw-r--. 1 user user 0 Sep 15 12:36 000202.log
-rw-rw-r--. 1 user user 75931 Sep 15 12:47 000205.log
-rw-rw-r--. 1 user user 0 Sep 15 12:49 000210.log
-rw-rw-r--. 1 user user 0 Sep 15 12:54 000217.log
-rw-rw-r--. 1 user user 29762 Sep 15 12:58 000220.log
-rw-rw-r--. 1 user user 89792 Sep 15 13:00 000224.log
-rw-rw-r--. 1 user user 29859 Sep 15 13:03 000230.log
-rw-rw-r--. 1 user user 140524 Sep 15 13:06 000236.log
-rw-rw-r--. 1 user user 74455 Sep 15 13:14 000243.log
-rw-rw-r--. 1 user user 53396 Sep 15 13:22 000247.log
-rw-rw-r--. 1 user user 22988 Sep 15 13:23 000252.log
-rw-rw-r--. 1 user user 22988 Sep 15 13:28 000259.log
-rw-rw-r--. 1 user user 0 Sep 15 13:31 000267.log
-rw-r--r--. 1 user user 0 Sep 15 14:15 000270.log

ls -l (on 4.3.0)
-rw-r--r--. 1 user user 236783 Sep 15 14:13 000270.log

[malexzx]

db work well with 4.9 (wal files compacted),
but from 4.10 - problem again arrives.

OptimizeLevelStyleCompaction() and OldDefaults() wont help.

[yiwu-arbug]

You might be hitting a regression that we are fixing with https://reviews.facebook.net/D63963
You can try the patch after its landed and see if it resolves your problem.

[malexzx]

The proposed patch works for my issue.
thank you

[yiwu-arbug]

Awesome. Thank you for reporting the issue!