9b51987521
Summary: When a block based table file is opened, if prefetch_index_and_filter is true, it will prefetch the index and filter blocks, putting them into the block cache. What this feature adds: when a L0 block based table file is opened, if pin_l0_filter_and_index_blocks_in_cache is true in the options (and prefetch_index_and_filter is true), then the filter and index blocks aren't released back to the block cache at the end of BlockBasedTableReader::Open(). Instead the table reader takes ownership of them, hence pinning them, ie. the LRU cache will never push them out. Meanwhile in the table reader, further accesses will not hit the block cache, thus avoiding lock contention. Test Plan: 'export TEST_TMPDIR=/dev/shm/ && DISABLE_JEMALLOC=1 OPT=-g make all valgrind_check -j32' is OK. I didn't run the Java tests, I don't have Java set up on my devserver. Reviewers: sdong Reviewed By: sdong Subscribers: andrewkr, dhruba Differential Revision: https://reviews.facebook.net/D56133
145 lines
4.5 KiB
INI
145 lines
4.5 KiB
INI
# This is a RocksDB option file.
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#
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# A typical RocksDB options file has four sections, which are
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# Version section, DBOptions section, at least one CFOptions
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# section, and one TableOptions section for each column family.
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# The RocksDB options file in general follows the basic INI
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# file format with the following extensions / modifications:
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#
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# * Escaped characters
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# We escaped the following characters:
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# - \n -- line feed - new line
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# - \r -- carriage return
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# - \\ -- backslash \
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# - \: -- colon symbol :
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# - \# -- hash tag #
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# * Comments
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# We support # style comments. Comments can appear at the ending
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# part of a line.
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# * Statements
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# A statement is of the form option_name = value.
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# Each statement contains a '=', where extra white-spaces
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# are supported. However, we don't support multi-lined statement.
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# Furthermore, each line can only contain at most one statement.
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# * Sections
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# Sections are of the form [SecitonTitle "SectionArgument"],
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# where section argument is optional.
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# * List
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# We use colon-separated string to represent a list.
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# For instance, n1:n2:n3:n4 is a list containing four values.
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#
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# Below is an example of a RocksDB options file:
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[Version]
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rocksdb_version=4.3.0
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options_file_version=1.1
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[DBOptions]
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stats_dump_period_sec=600
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max_manifest_file_size=18446744073709551615
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bytes_per_sync=8388608
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delayed_write_rate=2097152
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WAL_ttl_seconds=0
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WAL_size_limit_MB=0
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max_subcompactions=1
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wal_dir=
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wal_bytes_per_sync=0
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db_write_buffer_size=0
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keep_log_file_num=1000
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table_cache_numshardbits=4
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max_file_opening_threads=1
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writable_file_max_buffer_size=1048576
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random_access_max_buffer_size=1048576
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use_fsync=false
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max_total_wal_size=0
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max_open_files=-1
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skip_stats_update_on_db_open=false
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max_background_compactions=16
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manifest_preallocation_size=4194304
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max_background_flushes=7
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is_fd_close_on_exec=true
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max_log_file_size=0
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advise_random_on_open=true
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create_missing_column_families=false
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paranoid_checks=true
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delete_obsolete_files_period_micros=21600000000
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disable_data_sync=false
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log_file_time_to_roll=0
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compaction_readahead_size=0
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create_if_missing=false
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use_adaptive_mutex=false
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enable_thread_tracking=false
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disableDataSync=false
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allow_fallocate=true
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error_if_exists=false
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recycle_log_file_num=0
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skip_log_error_on_recovery=false
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allow_mmap_reads=false
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allow_os_buffer=true
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db_log_dir=
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new_table_reader_for_compaction_inputs=true
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allow_mmap_writes=false
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[CFOptions "default"]
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compaction_style=kCompactionStyleLevel
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compaction_filter=nullptr
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num_levels=6
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table_factory=BlockBasedTable
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comparator=leveldb.BytewiseComparator
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max_sequential_skip_in_iterations=8
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soft_rate_limit=0.000000
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max_bytes_for_level_base=1073741824
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memtable_prefix_bloom_probes=6
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memtable_prefix_bloom_bits=0
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memtable_prefix_bloom_huge_page_tlb_size=0
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max_successive_merges=0
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arena_block_size=16777216
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min_write_buffer_number_to_merge=1
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target_file_size_multiplier=1
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source_compaction_factor=1
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max_bytes_for_level_multiplier=8
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compaction_filter_factory=nullptr
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max_write_buffer_number=8
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level0_stop_writes_trigger=20
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compression=kSnappyCompression
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level0_file_num_compaction_trigger=4
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purge_redundant_kvs_while_flush=true
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max_write_buffer_number_to_maintain=0
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memtable_factory=SkipListFactory
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max_grandparent_overlap_factor=8
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expanded_compaction_factor=25
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hard_pending_compaction_bytes_limit=137438953472
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inplace_update_num_locks=10000
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level_compaction_dynamic_level_bytes=true
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level0_slowdown_writes_trigger=12
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filter_deletes=false
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verify_checksums_in_compaction=true
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min_partial_merge_operands=2
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paranoid_file_checks=false
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target_file_size_base=134217728
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optimize_filters_for_hits=false
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merge_operator=PutOperator
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compression_per_level=kNoCompression:kNoCompression:kNoCompression:kSnappyCompression:kSnappyCompression:kSnappyCompression
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compaction_measure_io_stats=false
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prefix_extractor=nullptr
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bloom_locality=0
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write_buffer_size=134217728
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disable_auto_compactions=false
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inplace_update_support=false
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[TableOptions/BlockBasedTable "default"]
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format_version=2
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whole_key_filtering=true
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skip_table_builder_flush=false
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no_block_cache=false
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checksum=kCRC32c
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filter_policy=rocksdb.BuiltinBloomFilter
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block_size_deviation=10
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block_size=8192
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block_restart_interval=16
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cache_index_and_filter_blocks=false
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pin_l0_filter_and_index_blocks_in_cache=false
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index_type=kBinarySearch
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hash_index_allow_collision=true
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flush_block_policy_factory=FlushBlockBySizePolicyFactory
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