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
..
file_read_sample.h	Change RocksDB License	7 years ago
histogram.cc	Add `getMin`, `getMax`, `getCount`, `getSum` to `HistogramData` class object. (#4742)	6 years ago
histogram.h	Scale histogram bucket size by constant factor	7 years ago
histogram_test.cc	fix inclusive-exclusiveness of histogram ToString	7 years ago
histogram_windowing.cc	Support pragma once in all header files and cleanup some warnings (#4339)	6 years ago
histogram_windowing.h	fix HistogramWindowingImpl copy-{assignment,constructor}	7 years ago
instrumented_mutex.cc	In instrumented mutex, take timing once for both of perf_context and statistics	7 years ago
instrumented_mutex.h	Change RocksDB License	7 years ago
iostats_context.cc	Directly refernce perf_context internally.	7 years ago
iostats_context_imp.h	Add a new CPU time counter to compaction report (#4889)	6 years ago
iostats_context_test.cc	Change RocksDB License	7 years ago
perf_context.cc	Allow copy for PerfContext objects (#4919)	6 years ago
perf_context_imp.h	Introduce a CPU time counter in perf_context (#4741)	6 years ago
perf_level.cc	Change RocksDB License	7 years ago
perf_level_imp.h	Change RocksDB License	7 years ago
perf_step_timer.h	Introduce a CPU time counter in perf_context (#4741)	6 years ago
statistics.cc	add GetStatsHistory to retrieve stats snapshots (#4748)	6 years ago
statistics.h	add GetStatsHistory to retrieve stats snapshots (#4748)	6 years ago
statistics_test.cc	Test mapping of Histograms and HistogramsNameMap (#4720)	6 years ago
thread_status_impl.cc	comment unused parameters to turn on -Wunused-parameter flag	7 years ago
thread_status_updater.cc	comment unused parameters to turn on -Wunused-parameter flag	7 years ago
thread_status_updater.h	Use RAII instead of pointers in cf_info_map	7 years ago
thread_status_updater_debug.cc	comment unused parameters to turn on -Wunused-parameter flag	7 years ago
thread_status_util.cc	comment unused parameters to turn on -Wunused-parameter flag	7 years ago
thread_status_util.h	Change RocksDB License	7 years ago
thread_status_util_debug.cc	Change RocksDB License	7 years ago