trie: move dirty data to clean cache on flush #18995
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Superseded by #19307. |
fjl
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Mar 26, 2019
This PR is a more advanced form of the dirty-to-clean cacher (#18995), where we reuse previous database write batches as datasets to uncache, saving a dirty-trie-iteration and a dirty-trie-rlp-reencoding per block.
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This is a tiny PR to test whether the clean cache can offset the archive performance hit of wiping the trie cache generations. For full nodes that seemed to have less impact (the dirty cache probably covering most of the trie cache generation surface), but for archive nodes the impact was too much. Lets see what happens now.