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roots: poll every 10 transids

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Restartng scans for each transid is a bit aggressive.  Scan every 10
transids for a polling rate close to the former BEES_COMMIT_INTERVAL.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell
2018-01-26 21:44:39 -05:00
parent 48e78bbe82
commit 762f833ab0
2 changed files with 19 additions and 9 deletions
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src/bees.h
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@ -103,6 +103,9 @@ const size_t BEES_MAX_CRAWL_SIZE = 1024;
// Insert this many items before switching to a new subvol
const size_t BEES_MAX_CRAWL_BATCH = 128;
// Wait this many transids between crawls
const size_t BEES_TRANSID_FACTOR = 10;
// If an extent has this many refs, pretend it does not exist
// to avoid a crippling btrfs performance bug
// The actual limit in LOGICAL_INO seems to be 2730, but let's leave a little headroom
@ -524,6 +527,7 @@ class BeesRoots : public enable_shared_from_this<BeesRoots> {
BeesThread m_crawl_thread;
BeesThread m_writeback_thread;
RateEstimator m_transid_re;
size_t m_transid_factor = BEES_TRANSID_FACTOR;
void insert_new_crawl();
void insert_root(const BeesCrawlState &bcs);