autoclean-once doesn't clean?

[grubles]

Using a recent commit of CLN but I remember noticing this going back years.

When trying to prune the database of failed forwards, I noticed autoclean-once leaves some 20 million items uncleaned while only cleaning a very small percentage of total failed forwards:

lightning-cli autoclean-once 60
{
   "autoclean": {
      "failedforwards": {
         "cleaned": 3023,
         "uncleaned": 20587161
      }
   }
}

Using an age of 1 minute should basically prune all of it, but CLN doesn't care?

[overcoin]

I have same issue as well. Current v25.09 but this is going on for years.

PS
I have noticed that if i use lightning-cli autoclean-once "succeededforwards" "1" and then lightning-cli autoclean-once "failedforwards" "1" it cleans all failedforwards. After day or two same issue appears again.

[jjacke13]

I have the same issue ( ~2.2M uncleaned ). I copied my sqlite db though and looked into it with sqlite studio. The table 'forwards' has only ~1300 rows , which wouldn't give such a high number in "uncleaned" . Could it be possible that in the result of "autoclean-once" are counted also failedforwards from old & closed channels?

[rustyrussell]

Ah! "num_uncleaned" is the forwards we didn't clean. That, of course, includes the successful ones!

I think that is very confusing, and we should change it!

[jjacke13]

The 'forwards' table in the db, does not contain 2M rows though