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19451cadff
Based on some simple testing done with a few combinations of cache sizes, it seems that the block cache has grown in importance compared to the where we were before changing on-disk format and adding a lot of other point caches. With these settings, there's roughly a 15% performance increase when processing blocks in the 18M range over the status quo while memory usage decreases by more than 1gb! Only a few values were tested so there's certainly more to do here but this change sets up a better baseline for any future optimizations. In particular, since the initial defaults were chosen root vertex id:s were introduced as key prefixes meaning that storage for each account will be grouped together and thus it becomes more likely that a block loaded from disk will be hit multiple times - this seems to give the block cache an edge over the row cache, specially when traversing the storage trie.
Core database
Layout of CoreDb descriptor objects
Objects dependence:
CoreDbRef -- Base descriptor
| | |
| | +--- CoreDbCtxRef -- Context descriptor
| | | | | |
| | | | | +--- CoreDbKvtRef -- Key-value table
| | | | |
| | | | +----- CoreDbMptRef -- Generic MPT
| | | |
| | | +------- CoreDbAccRef -- Accounts database
| | |
| | +--------- CoreDbTxRef -- Transaction handle
| |
| +----- CoreDbCtxRef
| : : : :
|
+------- CoreDbCtxRef
: : : :