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

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Baptiste Lemaire e817bc9628 Added memtable garbage statistics (#8411) ... Summary: **Summary**: 2 new statistics counters are added to RocksDB: `MEMTABLE_PAYLOAD_BYTES_AT_FLUSH` and `MEMTABLE_GARBAGE_BYTES_AT_FLUSH`. The former tracks how many raw bytes of useful data are present on the memtable at flush time, whereas the latter is tracks how many of these raw bytes are considered garbage, meaning that they ended up not being imported on the SSTables resulting from the flush operations. **Unit test**: run `make db_flush_test -j$(nproc); ./db_flush_test` to run the unit test. This executable includes 3 tests, that test support and correct stat calculations for workloads with inserts, deletes, and DeleteRanges. The parameters are set such that the workloads are performed on a single memtable, and a single SSTable is created as a result of the flush operation. The flush operation is manually called in the test file. The tests verify that the values of these 2 statistics counters introduced in this PR can be exactly predicted, showing that we have a full understanding of the underlying operations. **Performance testing**: `./db_bench -statistics -benchmarks=fillrandom -num=10000000` repeated 10 times. Timing done using "date" function in a bash script. _Results_: Original Rocksdb fork: mean 66.6 sec, std 1.18 sec. This feature branch: mean 67.4 sec, std 1.35 sec. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8411 Reviewed By: akankshamahajan15 Differential Revision: D29150629 Pulled By: bjlemaire fbshipit-source-id: 7b3c2e86d50c6aa34fa50fd134282eacb543a5b1		3 years ago
..
file_read_sample.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
histogram.cc	Fix FilterBench when RTTI=0 (#6732)	4 years ago
histogram.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
histogram_test.cc	Add a SystemClock class to capture the time functions of an Env (#7858)	3 years ago
histogram_windowing.cc	Add a SystemClock class to capture the time functions of an Env (#7858)	3 years ago
histogram_windowing.h	Add a SystemClock class to capture the time functions of an Env (#7858)	3 years ago
in_memory_stats_history.cc	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
in_memory_stats_history.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
instrumented_mutex.cc	Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)	3 years ago
instrumented_mutex.h	Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)	3 years ago
iostats_context.cc	Disable IOStatsContext/PerfContext if no thread local (#8117)	3 years ago
iostats_context_imp.h	Disable IOStatsContext/PerfContext if no thread local (#8117)	3 years ago
iostats_context_test.cc	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
perf_context.cc	Disable IOStatsContext/PerfContext if no thread local (#8117)	3 years ago
perf_context_imp.h	Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)	3 years ago
perf_level.cc	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
perf_level_imp.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
perf_step_timer.h	make PerfStepTimer struct smaller by reordering members (#7931)	3 years ago
persistent_stats_history.cc	Remove unused includes (#7604)	4 years ago
persistent_stats_history.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
statistics.cc	Added memtable garbage statistics (#8411)	3 years ago
statistics.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
statistics_test.cc	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
stats_history_test.cc	Fix testcase failures on windows (#7992)	3 years ago
thread_status_impl.cc	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
thread_status_updater.cc	Add a SystemClock class to capture the time functions of an Env (#7858)	3 years ago
thread_status_updater.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
thread_status_updater_debug.cc	Replace reinterpret_cast with static_cast_with_check (#7067)	4 years ago
thread_status_util.cc	Add a SystemClock class to capture the time functions of an Env (#7858)	3 years ago
thread_status_util.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	4 years ago
thread_status_util_debug.cc	Add a SystemClock class to capture the time functions of an Env (#7858)	3 years ago