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Impact of innodb_file_per_table Option On Crash Recovery Time

 | July 23, 2019 |  Posted In: MySQL, Open Source Databases

Starting at version MySQL5.6+ by default innodb_file_per_table is enabled and all data is stored in separate tablespaces. It provides some advantages. I will highlight some of them: You can reclaim disk space when truncating or dropping a table stored in a file-per-table tablespace. Truncating or dropping tables stored in the shared system tablespace creates free space internally […]

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Question about Semi-Synchronous Replication: the Answer with All the Details

 | August 23, 2018 |  Posted In: MariaDB, MySQL

semi-sync replication MySQL

I was recently asked a question by mail about MySQL Lossless Semi-Synchronous Replication. As I think the answer could benefit many people, I am answering it in a blog post. The answer brings us to the internals of transaction committing, of semi-synchronous replication, of MySQL (server) crash recovery, and of storage engine (InnoDB) crash recovery. […]

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