Hello, On Mon, Jun 3, 2019 at 7:31 PM Martin Urbanec &lt;martin.urbanec(a)wikimedia.cz&gt; wrote: could you paste the EXPLAIN output? You can generate that with Quarry (or thought the command line with `SHOW EXPLAIN FOR <connection>`). That may help us providing alternative query methods or seeing if an index is missing. Without looking at the query or the table, I wonder if it is missing a namespace and that is why it may be doing a full scan (explain may help)?

Hello Martin, Adding "and log_namespace = 2" to the where clause solves the performance problem. Regards. On Monday, June 3, 2019, 8:31:44 PM GMT+3, Martin Urbanec &lt;martin.urbanec(a)wikimedia.cz&gt; wrote: Hello,  I'm trying to run this query more fastly. Can you help me how to optimalize it? MariaDB [commonswiki_p]> select count(*) from logging_logindex where log_type="thanks" and log_title="Martin_Urbanec"; +----------+ | count(*) | +----------+ |        6 | +----------+ 1 row in set (8 min 42.87 sec) MariaDB [commonswiki_p]> It's supposed to provide web-accessible information, and it's not possible to wait 8 mins for completion.  https://tools.wmflabs.org/sql-optimizer/  didn't offer any solution.  Any suggestions? Martin_______________________________________________ Wikimedia Cloud Services mailing list Cloud(a)lists.wikimedia.org (formerly labs-l(a)lists.wikimedia.org) https://lists.wikimedia.org/mailman/listinfo/cloud