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Add two missing entries in the default option change log file.

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sdong 2017-01-31 10:54:46 -08:00
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commit 63cbcd25d1
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DEFAULT_OPTIONS_HISTORY.md
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@ -1,4 +1,8 @@
# RocksDB default options change log
## 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.