90 search results - page 8 / 18 » Monitoring Plan Optimality During Execution |
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
Virtually every commercial query optimizer chooses the best plan for a query using a cost model that relies heavily on accurate cardinality estimation. Cardinality estimation erro...
PVLDB
2010
13 years 6 months ago
2010
Prediction is emerging as an essential ingredient for real-time monitoring, planning and decision support applications such as intrusion detection, e-commerce pricing and automate...
PVLDB
2010
13 years 6 months ago
2010
The need to improve a suboptimal execution plan picked by the query optimizer for a repeatedly run SQL query arises routinely. Complex expressions, skewed or correlated data, and ...
OOPSLA
2007
Springer
14 years 1 months ago
2007
Springer
All high-performance production JVMs employ an adaptive strategy for program execution. Methods are first executed unoptimized and then an online profiling mechanism is used to ...
SIGMOD
2008
ACM
14 years 7 months ago
2008
ACM
Today's query processing engines do not take advantage of the multiple occurrences of a relation in a query to improve performance. Instead, each instance is treated as a dis...