shrink ancient append vecs at 90% (#28736)
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@ -4429,7 +4429,13 @@ impl AccountsDb {
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// randomly shrink ancient slots
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// this exercises the ancient shrink code more often
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let is_candidate = self.is_candidate_for_shrink(storage, true);
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let written_bytes = storage.written_bytes();
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let is_candidate = if written_bytes > 0 {
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let alive_ratio = (storage.alive_bytes() as u64) * 100 / written_bytes;
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alive_ratio < 90
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} else {
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false
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};
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if is_candidate || (can_randomly_shrink && thread_rng().gen_range(0, 100) == 0) {
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// we are a candidate for shrink, so either append us to the previous append vec
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// or recreate us as a new append vec and eliminate the dead accounts
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