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Merge pull request #6654 from neethuhaneesha/readAheadCompaction 

Adding rocksdb compaction readahead size option.
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neethuhaneesha 2022-03-23 09:04:25 -07:00 committed by GitHub
parent 0b5e14b32d 790ef9ff36
commit f7ec39c0ee
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 5 additions and 0 deletions
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1
fdbclient/ServerKnobs.cpp
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@ -380,6 +380,7 @@ void ServerKnobs::initialize(Randomize randomize, ClientKnobs* clientKnobs, IsSi
// Set ROCKSDB_CAN_COMMIT_DELAY_TIMES_ON_OVERLOAD to 0, to disable
init( ROCKSDB_CAN_COMMIT_DELAY_ON_OVERLOAD, 1 );
init( ROCKSDB_CAN_COMMIT_DELAY_TIMES_ON_OVERLOAD, 5 );
init( ROCKSDB_COMPACTION_READAHEAD_SIZE, 32768 ); // 32 KB, performs bigger reads when doing compaction.
// Leader election
bool longLeaderElection = randomize && BUGGIFY;

1
fdbclient/ServerKnobs.h
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@ -307,6 +307,7 @@ public:
int64_t ROCKSDB_CAN_COMMIT_COMPACT_BYTES_LIMIT;
int ROCKSDB_CAN_COMMIT_DELAY_ON_OVERLOAD;
int ROCKSDB_CAN_COMMIT_DELAY_TIMES_ON_OVERLOAD;
int64_t ROCKSDB_COMPACTION_READAHEAD_SIZE;
// Leader election
int MAX_NOTIFICATIONS;

3
fdbserver/KeyValueStoreRocksDB.actor.cpp
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@ -306,6 +306,9 @@ rocksdb::Options getOptions() {
if (SERVER_KNOBS->ROCKSDB_MAX_SUBCOMPACTIONS > 0) {
options.max_subcompactions = SERVER_KNOBS->ROCKSDB_MAX_SUBCOMPACTIONS;
}
if (SERVER_KNOBS->ROCKSDB_COMPACTION_READAHEAD_SIZE > 0) {
options.compaction_readahead_size = SERVER_KNOBS->ROCKSDB_COMPACTION_READAHEAD_SIZE;
}
options.statistics = rocksdb::CreateDBStatistics();
options.statistics->set_stats_level(rocksdb::kExceptHistogramOrTimers);