History cache doesn't work

[Kazunori HASEGAWA]

Hi, all.

I've got a problem with INN 2.3.3 on my NetBSD box.
its history cache doesn't seem to work at all.
I use CNFS srorage method and buffindexed as ovmethod.

here's status of history cache from daily report;

History cache:
Reason                                                         Count     %Count
Do not exist                                                  784655      97.4%
Cache misses                                                   21247       2.6%
Positive hits                                                      0       0.0%
Negative hits                                                      0       0.0%

-rw-rw-r--   1 news  news  330730022 Sep 14 12:22 history
-rw-rw-r--   1 news  news        108 Sep 14 12:22 history.dir
-rw-rw-r--   1 news  news   49248528 Sep 14 12:22 history.hash
-rw-rw-r--   1 news  news   65664704 Sep 14 12:22 history.index

Why have Positive/Negaive hits never been counted?
Can you gime me any ideas?

--
Kazunori HASEGAWA