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Message Posted: Thu, 08 Nov 2012 @ 10:25:36 GMT
< -- Anonymously Posted: Thursday, November 08, 2012 01:07 -- >
- now we do rush tests of JDBC tactical queries and ODBC DSS queries to teradata.
- for 10mins
- tactical queries
(typeA) 120 kinds of parameterized tactical queries(about 1000 queries/sec) - (PI select, non-PI select, PI update)
(typeB) 900 kinds of non-parameterized tactical queries(about 1000 queries/sec)
(typeC) 100 kinds of non-parameterized DSS queries(about 1000 queries/sec)
-SLG(service level goal)
(typeC) no specific slg
some of queries do not satisfy SLG.
These queries' cache hit ratio (qrylog cache flag=T) about 85%.
If the cache hit ratio is nearly 100%, SLG will be satisfied.
For example, in the rush test,
for three minitues, cache ratio continues 100%.
after 1 minutes, cache ratio is about 0%.
after that, cache ratio continues 100%.
Are there any method to maintain high cache ratio during the rush test?
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