Hi All,
We have a query that sometimes takes 10-15 seconds to run,
atleast thats what mytop or the slow log say, usually it runs in less
than 0.04 seconds....
SELECT title, template
FROM template
WHERE templateid IN
(608,2072,2073,1888,1898,1895,1897,1894,1896,1901,1903,1889,1900,1890,1891,1902,1904,2104,648,625,2152,617,1985,1996,646,1964,2103,2106,2113,1982,1983,1984,2074,623,2117,2124,2123,2122,2119,2121);
templateid is the primary key, also there are only 500 rows in the
table "template",
(mysql version 4.0.17 on Redhat 7.3 )
whats making the query to run slowly,
the server only runs at less than 10% cpu utilization, has lots of
ram and currently averages 120 qps ( 10M/day) , and is very fast 99%
of the time except for this query...
also the temp_table_size is set to 128MB, inspite of this the ratio
for Created_tmp_disk_tables/Created_tmp_tables is close to 0.1, could
this be a reason, why is Mysql creating soo many temp tables on the
disk....
Thanks a lot and any help would be appreciated ..
Kishore Jalleda
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