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From "Jonathan Shook (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-7962) usage counters on prepared statements, summary and details
Date Wed, 17 Sep 2014 18:46:33 GMT
Jonathan Shook created CASSANDRA-7962:
-----------------------------------------

             Summary: usage counters on prepared statements, summary and details
                 Key: CASSANDRA-7962
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7962
             Project: Cassandra
          Issue Type: New Feature
          Components: Core
            Reporter: Jonathan Shook
            Priority: Minor


Count the usages of prepared statements on the server side, and expose them via JMX. The original
query structure should be included. Expose a meaningful id which can be used in other places,
such as with JMX clients.  If enumerations are used to identify these for easier discussion,
enumerate according to the statement id.

Allow for "since last access" deltas, or "since server start", and require this parameter
to be specified.

This would allow easier identification of access pattern distribution in the case that prepared
statements are being used. It would provide useful metrics for diagnosis, testing, and monitoring.

.h3 Example nodetool outputs
command syntax:

.bq nodetool ( spusagecountsummary | spusagecountdetails ) ( deltas | alltime ) [ ks [ table
] ]

# nodetool spusagecountsummary deltas appks usertable 
(count, statement id)
56304 24ad327f9bb2578de663fc92336703dd
5 8743b52063cd84097a65d1633f5c74f5
1 663fc92336703dd24ad327f9bb2578de
0 92336703dd24ad327f9bb2578de663fc
0 bb2578de663fc922336703dd24ad327f9

# nodetool spusagecountdetails alltime appks usertable 
(count, statement id,\n query\n\n)
56320304 24ad327f9bb2578de663fc92336703dd
select user from usertable where userid=?;

265 8743b52063cd84097a65d1633f5c74f5
insert into usertable (userid,...) ...

11 663fc92336703dd24ad327f9bb2578de
select tags from tagcloud  where userid=?;

... and so forth ...





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