Please note that we are running Oracle 188.8.131.52 under SCO UNIX 5.0.5. The allocated SGA is as following:
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Total System Global Area 1064706136 bytes Fixed Size 41880 bytes Variable Size 204623040 bytes Database Buffers 858992640 bytes Redo Buffers 1048576 bytes
SELECT SUM(BYTES)/1024/1024 FROM V$SGASTAT I get the total size of the SGA greater than what we allocated, and there is no free memory. Any ideas regarding this issue?
V$SGASTAT does not include everything. For instance, it does not include the "Fixed Size" of the SGA. So you will see a difference between the SHOW SGA command and the sum of bytes from V$SGASTAT.
You should, however, see some free memory from V$SGASTAT. For instance, use the following query:SQL> select * from v$sgastat where name='free memory'; POOL NAME BYTES ----------- -------------------------- ---------------- shared pool free memory 7,062,044Here, I have 7MB free in my Shared Pool. You don't want a lot of free memory however since this will be wasting space.
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