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

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Akanksha Mahajan 0c7f455f85 Make initial auto readahead_size configurable (#9836) ... Summary: Make initial auto readahead_size configurable Pull Request resolved: https://github.com/facebook/rocksdb/pull/9836 Test Plan: Added new unit test Ran regression: Without change: ``` ./db_bench -use_existing_db=true -db=/tmp/prefix_scan_prefetch_main -benchmarks="seekrandom" -key_size=32 -value_size=512 -num=5000000 -use_direct_reads=true -seek_nexts=327680 -duration=120 -ops_between_duration_checks=1 Initializing RocksDB Options from the specified file Initializing RocksDB Options from command-line flags RocksDB: version 7.0 Date: Thu Mar 17 13:11:34 2022 CPU: 24 * Intel Core Processor (Broadwell) CPUCache: 16384 KB Keys: 32 bytes each (+ 0 bytes user-defined timestamp) Values: 512 bytes each (256 bytes after compression) Entries: 5000000 Prefix: 0 bytes Keys per prefix: 0 RawSize: 2594.0 MB (estimated) FileSize: 1373.3 MB (estimated) Write rate: 0 bytes/second Read rate: 0 ops/second Compression: Snappy Compression sampling rate: 0 Memtablerep: SkipListFactory Perf Level: 1 ------------------------------------------------ DB path: [/tmp/prefix_scan_prefetch_main] seekrandom : 483618.390 micros/op 2 ops/sec; 338.9 MB/s (249 of 249 found) ``` With this change: ``` ./db_bench -use_existing_db=true -db=/tmp/prefix_scan_prefetch_main -benchmarks="seekrandom" -key_size=32 -value_size=512 -num=5000000 -use_direct_reads=true -seek_nexts=327680 -duration=120 -ops_between_duration_checks=1 Set seed to 1649895440554504 because --seed was 0 Initializing RocksDB Options from the specified file Initializing RocksDB Options from command-line flags RocksDB: version 7.2 Date: Wed Apr 13 17:17:20 2022 CPU: 24 * Intel Core Processor (Broadwell) CPUCache: 16384 KB Keys: 32 bytes each (+ 0 bytes user-defined timestamp) Values: 512 bytes each (256 bytes after compression) Entries: 5000000 Prefix: 0 bytes Keys per prefix: 0 RawSize: 2594.0 MB (estimated) FileSize: 1373.3 MB (estimated) Write rate: 0 bytes/second Read rate: 0 ops/second Compression: Snappy Compression sampling rate: 0 Memtablerep: SkipListFactory Perf Level: 1 ------------------------------------------------ DB path: [/tmp/prefix_scan_prefetch_main] ... finished 100 ops seekrandom : 476892.488 micros/op 2 ops/sec; 344.6 MB/s (252 of 252 found) ``` Reviewed By: anand1976 Differential Revision: D35632815 Pulled By: akankshamahajan15 fbshipit-source-id: c8057a88f9294c9d03b1d434b03affe02f74d796		3 years ago
..
cf_options.cc	`compression_per_level` should be used for flush and changeable (#9658)	3 years ago
cf_options.h	`compression_per_level` should be used for flush and changeable (#9658)	3 years ago
configurable.cc	Fix an issue with MemTableRepFactory::CreateFromString (#9273)	3 years ago
configurable_helper.h	Fix some minor issues in the Customizable infrastructure (#8566)	3 years ago
configurable_test.cc	Fix GetOptionsPtr for Wrapped Customizable; Allow null options map (#9213)	3 years ago
configurable_test.h	Move RegisterOptions into the Configurable API (#8223)	4 years ago
customizable.cc	Add support to the ObjectRegistry for ManagedObjects (#8658)	3 years ago
customizable_test.cc	Prevent double caching in the compressed secondary cache (#9747)	3 years ago
db_options.cc	Document SetOptions API (#9778)	3 years ago
db_options.h	Remove deprecated option new_table_reader_for_compaction_inputs (#9443)	3 years ago
options.cc	Provide implementation to prefetch data asynchronously in FilePrefetchBuffer (#9674)	3 years ago
options_helper.cc	New backup meta schema, with file temperatures (#9660)	3 years ago
options_helper.h	New backup meta schema, with file temperatures (#9660)	3 years ago
options_parser.cc	Allow unregistered options to be ignored in DBOptions from files (#9045)	3 years ago
options_parser.h	Bring the Configurable options together (#5753)	4 years ago
options_settable_test.cc	Make initial auto readahead_size configurable (#9836)	3 years ago
options_test.cc	Account memory of big memory users in BlockBasedTable in global memory limit (#9748)	3 years ago