我想提高查询速度。据我所知，查询已经过非常优化，并使用了INNODB表。
建议我从MySQL 5.6升级到Maria DB 10.2。
我原本希望查询至少快一些，但是所有查询似乎都比以前慢或稍慢。
DB的大小没有改变，查询也没有改变，据我所知，这两个结构都没有。缓冲区大小似乎还可以，但仍有可用空间。 我还尝试过运行OPTIMIZE TABLE命令。
我所拥有的是大约2个不同的视图表，这些视图表对核心表进行了一些联接。两者都变慢，因为查询需要更长的时间才能运行。从它们读取的前端接口现在加载速度也变慢。
告诉我的唯一一件事是，自从大约7个小时前进行升级以来，我应该等待24个小时，以便DB获得统计信息，然后我的主机可以运行MySQL Tuner尝试进行优化。但我真的怀疑这些调整是否会提供帮助。
升级的唯一好处是MariaDB占用了40％的CPU电源，而不是MYSQL占用了90％的电源（具有4个内核）。
我正在考虑再次将完整的VPS还原到My SQL 5.6，然后也许尝试升级到5.7，看看是否有帮助。 我不太愿意这样做，因为我可能会丢失一些数据。
您能提供给我一个清单，看看为什么MariaDB变慢吗？我对此寄予厚望。
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MySQL TUNER输出：
General recommendations:
Control warning line(s) into /var/lib/mysql/host.zzz.com.err file
Control error line(s) into /var/lib/mysql/host.zzz.com.err file
Restrict Host for user@% to user@SpecificDNSorIp
MySQL was started within the last 24 hours - recommendations may be inaccurate
Configure your accounts with ip or subnets only, then update your configuration with skip-name-resolve=1
Adjust your join queries to always utilize indexes
Temporary table size is already large - reduce result set size
Reduce your SELECT DISTINCT queries without LIMIT clauses
Consider installing Sys schema from https://github.com/mysql/mysql-sys for MySQL
Consider installing Sys schema from https://github.com/good-dba/mariadb-sys for MariaDB
Variables to adjust:
join_buffer_size (> 256.0K, or always use indexes with JOINs)
innodb_buffer_pool_size (>= 631.3M) if possible.
innodb_log_file_size should be (=64M) if possible, so InnoDB total log files size equals to 25% of buffer pool size.
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