Hi All, Our mgmt is intrested is looking at the shared pool free memory and its usage over past sometime . Therefore here is the output what i got it in one of our instance. I could notice there are some of the negative values under free memory , library_cache and sql_area as well for which i'm not able to intrepret thats significane. Can somebody help me please ? *Time* *Instance No* *Free_Memory * *Library_Cache* *sql_area* 2013_08_18 23:00 2 2921456 116904 768440 2013_08_18 22:00 2 -184008 21136 -725048 2013_08_18 21:00 2 -1680760 183368 -443464 2013_08_18 20:00 2 -224120 -50560 408680 2013_08_18 19:00 2 796056 9544 -59872 2013_08_18 18:00 2 -2703752 88184 551792 2013_08_18 17:00 2 2079912 -90384 -4520 2013_08_18 16:00 2 -2317824 95864 -212000 2013_08_18 15:00 2 -802824 13752 -491904 2013_08_18 14:00 2 384304 36440 60808 2013_08_18 13:00 2 -1577248 35072 673632 2013_08_18 12:00 2 679992 -26176 -779432 2013_08_18 11:00 2 -1874672 15904 -39936 2013_08_18 10:00 2 650376 8536 154184 2013_08_18 09:00 2 -1439272 -14624 -73520 Regards Bala -- //www.freelists.org/webpage/oracle-l