To use those indexes on title you also need to filter by log_namespace: MariaDB [commonswiki_p]> select count(*) from logging_logindex where log_type="thanks" and log_title="Martin_Urbanec" and log_namespace = 2; +----------+ | count(*) | +----------+ | 6 | +----------+ 1 row in set (0.03 sec)
On Mon, 3 Jun 2019 at 18:47, Jaime Crespo jcrespo@wikimedia.org wrote:
Hello,
On Mon, Jun 3, 2019 at 7:31 PM Martin Urbanec martin.urbanec@wikimedia.cz 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)
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)?
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