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| -rw-r--r-- | src/rocksdb/DEFAULT_OPTIONS_HISTORY.md | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/rocksdb/DEFAULT_OPTIONS_HISTORY.md b/src/rocksdb/DEFAULT_OPTIONS_HISTORY.md new file mode 100644 index 000000000..82c64d523 --- /dev/null +++ b/src/rocksdb/DEFAULT_OPTIONS_HISTORY.md @@ -0,0 +1,24 @@ +# RocksDB default options change log (NO LONGER MAINTAINED) +## Unreleased +* delayed_write_rate takes the rate given by rate_limiter if not specified. + +## 5.2 +* Change the default of delayed slowdown value to 16MB/s and further increase the L0 stop condition to 36 files. + +## 5.0 (11/17/2016) +* Options::allow_concurrent_memtable_write and Options::enable_write_thread_adaptive_yield are now true by default +* Options.level0_stop_writes_trigger default value changes from 24 to 32. + +## 4.8.0 (5/2/2016) +* options.max_open_files changes from 5000 to -1. It improves performance, but users need to set file descriptor limit to be large enough and watch memory usage for index and bloom filters. +* options.base_background_compactions changes from max_background_compactions to 1. When users set higher max_background_compactions but the write throughput is not high, the writes are less spiky to disks. +* options.wal_recovery_mode changes from kTolerateCorruptedTailRecords to kPointInTimeRecovery. Avoid some false positive when file system or hardware reorder the writes for file data and metadata. + +## 4.7.0 (4/8/2016) +* options.write_buffer_size changes from 4MB to 64MB. +* options.target_file_size_base changes from 2MB to 64MB. +* options.max_bytes_for_level_base changes from 10MB to 256MB. +* options.soft_pending_compaction_bytes_limit changes from 0 (disabled) to 64GB. +* options.hard_pending_compaction_bytes_limit changes from 0 (disabled) to 256GB. +* table_cache_numshardbits changes from 4 to 6. +* max_file_opening_threads changes from 1 to 16. |