PostgreSQL 9.5 Alpha 1 发布，排序性能提升
7月18日杭州 OSC 源创会正在报名，送机械键盘和开源无码内裤 
PostgreSQL 9.5 Alpha 1 发布，该版本值得关注的新特性包括：
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Block-Range Indexes (BRIN) which enable compact indexing of very large tables
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Large speed improvements in in-memory sorting and hashing
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Automated management of transaction log size
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INSERT ON CONFLICT UPDATE, otherwise known as "UPSERT"
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Grouping Sets, CUBE and ROLLUP analytic operations
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Row-Level Security (RLS) support
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More JSONB data manipulation functions and operators
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Added the pg_rewind tool and other high availability improvements to replication
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Multiple enhancements to Foreign Data Wrappers, including IMPORT FOREIGN SCHEMA
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Large increases in multi-core and large memory scalability
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