Hey! I am investigation the performance decline in our software tendermint/tendermint#1835. We're using goleveldb as a primary DB for storing blocks plus some other data.

Looks like saving a batch of data (~1MB) can result in ~ 15 sec. due to compaction process or something:

tendermint/tendermint#1835 (comment)
(the time seems to be increasing with every spike)

The write speed is approximately 1MB per second.

Is this expected and we need to fine tune compaction options or this looks like a bug to you?

Thank you!