Revision b952c898b663376009e136f57bfdbc03e5c55c8c authored by Yi Wu on 15 November 2016, 03:54:17 UTC, committed by Facebook Github Bot on 15 November 2016, 04:09:19 UTC
Summary: Parallize persistent_cache_test and transaction_test Closes https://github.com/facebook/rocksdb/pull/1506 Differential Revision: D4179392 Pulled By: IslamAbdelRahman fbshipit-source-id: 05507a1
1 parent 3b192f6
DEFAULT_OPTIONS_HISTORY.md
# RocksDB default options change log
## 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.
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