{"id":1356,"date":"2021-01-12T16:47:38","date_gmt":"2021-01-12T08:47:38","guid":{"rendered":"http:\/\/www.821121.com\/?p=1356"},"modified":"2021-01-12T16:47:38","modified_gmt":"2021-01-12T08:47:38","slug":"12c%e6%96%b0%e7%89%b9%e6%80%a7%ef%bc%9ain-memory%e5%ae%9e%e6%88%98%ef%bc%887%ef%bc%89%e5%a6%82%e4%bd%95%e5%b0%86%e6%95%b0%e6%8d%ae%e5%a1%ab%e5%85%85%e5%88%b0inmemory%e4%b8%ad","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=1356","title":{"rendered":"12C\u65b0\u7279\u6027\uff1aIN-MEMORY\u5b9e\u6218\uff087\uff09\u5982\u4f55\u5c06\u6570\u636e\u586b\u5145\u5230inmemory\u4e2d"},"content":{"rendered":"

\u5c06\u6570\u636e\u586b\u5145\u5230inmemory\u4e2d\u6709\u4ee5\u4e0b\u51e0\u79cd\u529e\u6cd5<\/p>\n

1\u3001\u4f7f\u7528count\u8bed\u53e5\u586b\u5145<\/h2>\n

\u8fd9\u4e2a\u4e4b\u524d\u7684\u5b9e\u9a8c\u4e2d\u6709\u63d0\u53ca\uff0c\u4fdd\u9669\u8d77\u89c1\u9700\u8981\u52a0\u4e0afull hint\u4fdd\u8bc1\u5168\u8868\u67e5\u8be2\u3002\u5b9e\u9a8c\u5982\u4e0b\uff1a<\/p>\n

SQL>  ALTER table  test1 no inmemory;\n\nTable altered.\n\nSQL>  ALTER table  test1 INMEMORY;\n\nTable altered.\n\nSQL>  select INST_ID,SEGMENT_NAME,INMEMORY_SIZE\/1024\/1024,BYTES\/1024\/1024,BYTES_NOT_POPULATED\/1024\/1024,INMEMORY_DISTRIBUTE,INMEMORY_DUPLICATE,POPULATE_STATUS from gv$im_segments;\n\nno rows selected\n\nSQL> SELECT \/*+ FULL(test1) NO_PARALLEL(test1) *\/ COUNT(*) FROM test1;\n\n  COUNT(*)\n----------\n     72573\n\nSQL> select INST_ID,SEGMENT_NAME,INMEMORY_SIZE\/1024\/1024,BYTES\/1024\/1024,BYTES_NOT_POPULATED\/1024\/1024,INMEMORY_DISTRIBUTE,INMEMORY_DUPLICATE,POPULATE_STATUS from gv$im_segments;\n\n   INST_ID SEGME INMEMORY_SIZE\/1024\/1024 BYTES\/1024\/1024 BYTES_NOT_POPULATED\/1024\/1024 INMEMORY_D INMEMORY_DUPLICATE   POPULATE_S\n---------- ----- ----------------------- --------------- ----------------------------- ---------- -------------------- ----------\n         1 TEST1                    4.25       11.015625                             0 AUTO       NO DUPLICATE         COMPLETED<\/code><\/pre>\n
2\u3001PRIORITY HIGH\u8fdb\u884c\u586b\u5145<\/h2>\n
SQL>  ALTER table  test1 no inmemory;\n\nTable altered.\n\nSQL>  ALTER table  test1 INMEMORY;\n\nTable altered.\n\nSQL>  select INST_ID,SEGMENT_NAME,INMEMORY_SIZE\/1024\/1024,BYTES\/1024\/1024,BYTES_NOT_POPULATED\/1024\/1024,INMEMORY_DISTRIBUTE,INMEMORY_DUPLICATE,POPULATE_STATUS from gv$im_segments;\n\nno rows selected\n\nSQL> ALTER table  test1 no inmemory;\n\nTable altered.\n\nSQL> ALTER table  test1 INMEMORY PRIORITY HIGH;\n\nTable altered.\n\nSQL> select INST_ID,SEGMENT_NAME,INMEMORY_SIZE\/1024\/1024,BYTES\/1024\/1024,BYTES_NOT_POPULATED\/1024\/1024,INMEMORY_DISTRIBUTE,INMEMORY_DUPLICATE,POPULATE_STATUS from gv$im_segments;\n\n   INST_ID SEGME INMEMORY_SIZE\/1024\/1024 BYTES\/1024\/1024 BYTES_NOT_POPULATED\/1024\/1024 INMEMORY_D INMEMORY_DUPLICATE   POPULATE_S\n---------- ----- ----------------------- --------------- ----------------------------- ---------- -------------------- ----------\n         1 TEST1                    4.25       11.015625                             0 AUTO       NO DUPLICATE         COMPLETED<\/code><\/pre>\n
3\u3001\u4f7f\u7528DBMS_INMEMORY.POPULATE\u586b\u5145<\/h2>\n
SQL> ALTER table  test1 no inmemory;\n\nTable altered.\n\nSQL> ALTER table  test1 INMEMORY;\n\nTable altered.\n\nSQL> select INST_ID,SEGMENT_NAME,INMEMORY_SIZE\/1024\/1024,BYTES\/1024\/1024,BYTES_NOT_POPULATED\/1024\/1024,INMEMORY_DISTRIBUTE,INMEMORY_DUPLICATE,POPULATE_STATUS from gv$im_segments;\n\nno rows selected\n\nSQL> BEGIN\n  2    DBMS_INMEMORY.POPULATE( schema_name => 'TEST', table_name => 'TEST1');\n  3  END;\n  4  \/\n\nPL\/SQL procedure successfully completed.\n\nSQL> select INST_ID,SEGMENT_NAME,INMEMORY_SIZE\/1024\/1024,BYTES\/1024\/1024,BYTES_NOT_POPULATED\/1024\/1024,INMEMORY_DISTRIBUTE,INMEMORY_DUPLICATE,POPULATE_STATUS from gv$im_segments;\n\n   INST_ID SEGME INMEMORY_SIZE\/1024\/1024 BYTES\/1024\/1024 BYTES_NOT_POPULATED\/1024\/1024 INMEMORY_D INMEMORY_DUPLICATE   POPULATE_S\n---------- ----- ----------------------- --------------- ----------------------------- ---------- -------------------- ----------\n         1 TEST1                    4.25       11.015625                             0 AUTO       NO DUPLICATE         COMPLETED<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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