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| author | eunhhu <[email protected]> | 2026-09-30 08:54:29 +0100 |
|---|---|---|
| committer | eunhhu <[email protected]> | 2026-09-30 08:54:29 +0100 |
| commit | 9840d27a9e437de32256024a2fd6a3219a239815 (patch) | |
| tree | eba57012bcdaac8e019d1421370a570a3e9f70d9 /docs/research/000-working-method.md | |
| parent | 987d4d7aa08624e28d0ea18a1e66e359a0230c80 (diff) | |
| download | pure-9840d27a9e437de32256024a2fd6a3219a239815.tar.gz pure-9840d27a9e437de32256024a2fd6a3219a239815.zip | |
Say what snapshots cost the owner, and what reusing their nodes gave (107)
Most of it was the allocator: leaves past glibc's thread cache, freed by
whichever thread let the last snapshot go. jemalloc was 11-14% faster
at more memory; reusing the nodes in Pure gave a median +9.4% over six
pairs, 4-8% less CPU a transaction in all six, and 1.97x the state bytes
resident where it was 2.18x. TPC-C in RAM is now 4.0x a tuned SQLite at
W=1 and 3.5x at W=4; finding items is the owner's largest part now.
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