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During IBD, prune as much as possible until we get close to where we will eventually keep blocks

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This commit is contained in:
Luke Dashjr 2021-01-02 01:46:00 +00:00
parent 96ec3b67a7
commit d298ff8b62
1 changed files with 8 additions and 4 deletions
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12
src/node/blockstorage.cpp
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@ -298,6 +298,7 @@ void BlockManager::FindFilesToPrune(
// Distribute our -prune budget over all chainstates.
const auto target = std::max(
MIN_DISK_SPACE_FOR_BLOCK_FILES, GetPruneTarget() / chainman.GetAll().size());
const uint64_t target_sync_height = chainman.m_best_header->nHeight;
if (chain.m_chain.Height() < 0 || target == 0) {
return;
@ -320,10 +321,13 @@ void BlockManager::FindFilesToPrune(
// On a prune event, the chainstate DB is flushed.
// To avoid excessive prune events negating the benefit of high dbcache
// values, we should not prune too rapidly.
// So when pruning in IBD, increase the buffer a bit to avoid a re-prune too soon.
if (chainman.IsInitialBlockDownload()) {
// Since this is only relevant during IBD, we use a fixed 10%
nBuffer += target / 10;
// So when pruning in IBD, increase the buffer to avoid a re-prune too soon.
const auto chain_tip_height = chain.m_chain.Height();
if (chainman.IsInitialBlockDownload() && target_sync_height > (uint64_t)chain_tip_height) {
// Since this is only relevant during IBD, we assume blocks are at least 1 MB on average
static constexpr uint64_t average_block_size = 1000000; /* 1 MB */
const uint64_t remaining_blocks = target_sync_height - chain_tip_height;
nBuffer += average_block_size * remaining_blocks;
}
for (int fileNumber = 0; fileNumber < this->MaxBlockfileNum(); fileNumber++) {