Scenarios of Threshold and Summary Options - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ - Database Administration
Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Language
English (United States)
Last Update
2019-05-03
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Product Category
Software
Teradata Vantage
IF you… THEN …
create rules for a user and specify LIMIT SUMMARY=5,10,15 and during the next session, and every query takes longer than 5 seconds but less than 10 seconds to complete all queries fall into the second bucket (5 to 10 seconds), so the second group is the only query count logged for the session in DBQLSummaryTbl.
create rules for a user and specify LIMIT SUMMARY = 5,10,15 and during the next session, every query completes in less than 5 seconds all queries fall into the first bucket (up to 5 seconds), so the first group is the only query count logged for the session in DBQLSummaryTbl.
create rules and specify LIMIT SUMMARY=1,15,10 the statement is accepted (no checking is performed on SUMMARY input values) but the results are unpredictable.
create rules for UserA and specify SQL, OBJECTS LIMIT THRESHOLD (without a time value), and UserA then processes four queries, where:
  • One query takes more than 5 seconds to complete
  • Three queries complete in less than 5 seconds
 the statement is accepted and the default value of 5 seconds is assigned. For the next session of UserA:
  • The longer query is logged in DBQLSqlTbl, DBQLObjTbl, and DBQLogTbl, with values in all valid fields of the rows.
  • For each of the three shorter queries:
    • No entries are made in DBQLSqlTbl, DBQLObjTbl, and DBQLogTbl.
    • DBQLSummaryTbl will have a row with these values:
      COUNT = 3
SECONDS = 10
LOWHIST = 5
HIGHHIST = 0
create a rule and specify LIMIT THRESHOLD=100000 An error is returned; THRESHOLD must be less than 32K.