In this context, understanding the query optimization architecture can help to resolve query performance issues more easily and we can also interpret the execution plans more logically. The reason for this problem is query optimization processes are a bit complicated and puzzling. The query optimization is very grinding work for the database professionals who desire to overcome performance issues of the queries. Time Model Statistics section shows statistics related to in-memory CPU usage and Instance Activity Statistics section shows statistics related to in-memory activities.This article intends to give some details about the query optimization process in SQL Server. In-memory statistics in AWR report: AWR report contains a new section - In-Memory Segments Statistics - that shows in-memory segment consumption based on various attributes, such as, scans, DB block changes, populate CUs, and repopulate CUs. Top Events, Top SQL, and Activity Over Time sections show CPU consumption by various in-memory operations. In-memory statistics in ASH report: ASH report header table shows the size of in-memory pool under In Memory Area column. It also contains Plan Note button, which when clicked, shows the notes that are generated in the explain plan for the SQL statement. The Plan Statistics tab contains a drop down list to show current plan, final plan, and full plan. The Execution plan shows Resolving or Resolved icon depending upon the current status of that plan. SQL Monitor report now supports Adaptive plans. In-memory statistics in SQL Monitor report: Activity % in Time and Wait Statistics panel, Activity column in Plan Statistics table, and Activity tab in SQL Monitor report show CPU consumed by SQL commands while executing in-memory query operations. SQL Monitor report, ASH report, and AWR report now show statistics for various in-memory operations. The new Oracle Database In-Memory Column Store (IM column store) feature accelerates database performance of analytics, data warehousing, and online transaction processing (OLTP) applications. Manageability support for In-Memory Column Store The following features are new in this release:
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