MariaDB 10.1.4 發布，MySQL 衍生版

MariaDB 是一個采用 Aria 存儲引擎的 MySQL 分支版本，是由原來 MySQL 的作者 Michael Widenius 創辦的公司所開發的免費開源的數據庫服務器。

與 MySQL 相比較，MariaDB 更強的地方在于：

• Maria 存儲引擎

• PBXT 存儲引擎

• XtraDB 存儲引擎

• FederatedX 存儲引擎

• 更快的復制查詢處理

• 線程池

• 更少的警告和bug

• 運行速度更快

• 更多的 Extensions (More index parts, new startup options etc)

• 更好的功能測試

• 數據表消除

• 慢查詢日志的擴展統計

• 支持對 Unicode 的排序

這是 MariaDB 10.1 的第二個 Beta 測試版本，也是第 5 個發行版本，該版本值得關注的改進內容包括：

• Encryption: 很多跟表和表空間加密的改變在該版本得以實現，詳情請看 updated documentation 和 nice summarization here

• Consistent support for IF EXISTS, IF NOT EXISTS, and OR REPLACE clauses was added to:

• CREATE EVENT and DROP EVENT

• CREATE INDEX and DROP INDEX

• CREATE TRIGGER and DROP TRIGGER

• New server variable: New server variable enforce_storage_engine

• New status variable: New status variables to show the number of grants on different objects (Also see Status Variables Added in MariaDB 10.1)

• New status variable: New status variables to track MASTER_GTID_WAIT time. This feature was contributed by Daniel Black.

• New status variable: New status variable Slave_skipped_errors. This feature was contributed by Daniel Black.

• Performance: xid cache scalability was significantly improved (by using lock-free hash)

• Performance: VIEW definitions are now cached in memory (in the table definition cache)

• Replication: Starting with this release, commits in certain instances in parallel replication complete immediately, avoiding losing throughput when many transactions need conflicting locks. See binlog_commit_wait_count.

完整改進記錄：https://mariadb.com/kb/en/mariadb/mariadb-1014-changelog/