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

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Zhongyi Xie c4f5d0aa15 add GetStatsHistory to retrieve stats snapshots (#4748) ... Summary: This PR adds public `GetStatsHistory` API to retrieve stats history in the form of an std map. The key of the map is the timestamp in microseconds when the stats snapshot is taken, the value is another std map from stats name to stats value (stored in std string). Two DBOptions are introduced: `stats_persist_period_sec` (default 10 minutes) controls the intervals between two snapshots are taken; `max_stats_history_count` (default 10) controls the max number of history snapshots to keep in memory. RocksDB will stop collecting stats snapshots if `stats_persist_period_sec` is set to 0. (This PR is the in-memory part of https://github.com/facebook/rocksdb/pull/4535) Pull Request resolved: https://github.com/facebook/rocksdb/pull/4748 Differential Revision: D13961471 Pulled By: miasantreble fbshipit-source-id: ac836d401ecb84ea92216bf9966f969dedf4ad04		6 years ago
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benchmark/src/main/java/org/rocksdb/benchmark	Expose max_background_jobs option in RocksJava	7 years ago
crossbuild	Updated the CentOS 6 Docker build for RocksJava to a newer GCC toolchain (#4756)	6 years ago
rocksjni	add GetStatsHistory to retrieve stats snapshots (#4748)	6 years ago
samples/src/main/java	Add TransactionDB and OptimisticTransactionDB to the Java API	7 years ago
src	Header logger should call LogHeader() (#4980)	6 years ago
CMakeLists.txt	Plumb WriteBufferManager through JNI (#4492)	6 years ago
HISTORY-JAVA.md	Update JAVA-HISTORY.md for v3.13	10 years ago
Makefile	Plumb WriteBufferManager through JNI (#4492)	6 years ago
RELEASE.md	Fixed packaging of java crossbuild jar by forcing all compiled binaries to be output to the java/target directory. The uber crossbuild jar is then assembled within the java/target directory.	9 years ago
jdb_bench.sh	Suppress lint in old files	7 years ago
rocksjni.pom	Update java/rocksjni.pom	8 years ago