fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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Chen Shen 78cb6b6112 Provide byte[] version of SstFileWriter.merge to reduce GC Stall ... Summary: In Java API, `SstFileWriter.put/merge/delete` takes `Slice` type of key and value, which is a Java wrapper object around C++ Slice object. The Slice object inherited [ `finalize`](3c327ac2d0/java/src/main/java/org/rocksdb/AbstractNativeReference.java (L69)) method, which [added huge overhead](https://softwareengineering.stackexchange.com/questions/288715/is-overriding-object-finalize-really-bad/288753#288753) to JVM while creating new SstFile. To address this issue, this PR overload the merge method to take Java byte array instead of the Slice object, and added unit test for it. We also benchmark these two different merge function, where we could see GC Stall reduced from 50% to 1%, and the throughput increased from 50MB to 200MB. Closes https://github.com/facebook/rocksdb/pull/2746 Reviewed By: sagar0 Differential Revision: D5653145 Pulled By: scv119 fbshipit-source-id: b55ea58554b573d0b1c6f6170f8d9223811bc4f5		7 years ago
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backupablejni.cc	Change RocksDB License	7 years ago
backupenginejni.cc	Change RocksDB License	7 years ago
cassandra_compactionfilterjni.cc	Cassandra compaction filter for purge expired columns and rows	7 years ago
cassandra_value_operator.cc	Fix license headers in Cassandra related files	7 years ago
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compaction_filter.cc	Change RocksDB License	7 years ago
compaction_options_fifo.cc	Change RocksDB License	7 years ago
compaction_options_universal.cc	Change RocksDB License	7 years ago
comparator.cc	Change RocksDB License	7 years ago
comparatorjnicallback.cc	Change RocksDB License	7 years ago
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env.cc	Change RocksDB License	7 years ago
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filter.cc	Change RocksDB License	7 years ago
ingest_external_file_options.cc	Change RocksDB License	7 years ago
iterator.cc	Change RocksDB License	7 years ago
loggerjnicallback.cc	Change RocksDB License	7 years ago
loggerjnicallback.h	Change RocksDB License	7 years ago
lru_cache.cc	Change RocksDB License	7 years ago
memtablejni.cc	Change RocksDB License	7 years ago
merge_operator.cc	Change RocksDB License	7 years ago
options.cc	Change RocksDB License	7 years ago
portal.h	Change RocksDB License	7 years ago
ratelimiterjni.cc	Change RocksDB License	7 years ago
remove_emptyvalue_compactionfilterjni.cc	Change RocksDB License	7 years ago
restorejni.cc	Change RocksDB License	7 years ago
rocksdb_exception_test.cc	Change RocksDB License	7 years ago
rocksjni.cc	Change RocksDB License	7 years ago
slice.cc	Change RocksDB License	7 years ago
snapshot.cc	Change RocksDB License	7 years ago
sst_file_writerjni.cc	Provide byte[] version of SstFileWriter.merge to reduce GC Stall	7 years ago
statistics.cc	Change RocksDB License	7 years ago
statisticsjni.cc	Change RocksDB License	7 years ago
statisticsjni.h	Change RocksDB License	7 years ago
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write_batch.cc	Change RocksDB License	7 years ago
write_batch_test.cc	Gcc 7 ParsedInternalKey replace memset with clear function.	7 years ago
write_batch_with_index.cc	Change RocksDB License	7 years ago
writebatchhandlerjnicallback.cc	Change RocksDB License	7 years ago
writebatchhandlerjnicallback.h	Change RocksDB License	7 years ago