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Not all data is in memory on an in memory table

edited Apr 15, 2021 12:45AM in Database


How to get 100% of content into an in memory table


I have a table WC_LEAVE_LIAB_F defined as In memory


I believe it was 100% in memory as graphs were generated quickly


I applied the BTREE index on SNAPSHOT_DT and the table queries now return quickly, however the performance of the chart has dropped


Looking at the inmemory stats on V$IM_SEGMENTS  there is a large amount of data reported as BYTES_NOT_POPULATED so guessing some data has been knocked out of memory since the index creation.


How can I get this data back in memory?

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