MariaDB 10.4.9 发布了，值得关注的改进内容包括：
MDEV-20864: Debug-only optioninnodb_change_buffer_dumpfor dumping the contents of the InnoDB change buffer to the server error log at startup.MariaBackup: MDEV-18438: mbstream recreates xtrabackup_info on same directory as backup fileMDEV-20703: mariabackup creates binlog files in server binlog directory on --prepare --export stepFULLTEXT INDEX: MDEV-19647: 删除全文索引并重启导致服务器挂起MDEV-19529: InnoDB hang onDROP FULLTEXT INDEXMDEV-19073: FTS row mismatch after crash recoveryMDEV-20621: FULLTEXT INDEX activity causes InnoDB hangMDEV-20927: Duplicate key with auto incrementALTER TABLE: MDEV-20799: DROP Virtual Column crashMDEV-20852: BtrBulk is unnecessarily holdingdict_index_t::lockSystem-Versioned Tables: MDEV-16210: FK constraints on versioned tables use historical rows, which may cause constraint violationMDEV-20812: UnexpectedER_ROW_IS_REFERENCED_2or server crash inrow_ins_foreign_report_errupon DELETE from versioned table with FKMDEV-7: corruption after instant DROP/reorder COLUMNGalera wsrep library升级到 26.4.3为 Ubuntu 19.10 Eoan 准备的发行包已经就绪修复以下安全漏洞： CVE--2974CVE--2938
完整的改进记录请看/kb/en/mariadb-1049-changelog/
