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编辑|SQL和数据库技术(ID:SQLplusDB)
执行如下命令，修改db_cache_size的大小时候发生了ORA-32017和ORA-00384错误。
ALTER SYSTEM SET db_cache_size=100M scope=spfile
错误内容信息：
ORA-32017: failure in updating SPFILE
ORA-00384: Insufficient memory to grow cache
自动内存管理有效的时候（AMM）时候，如果设置了比当前缓存大小较大的值，会发生ORA-384。
作为解决方法，可以通过V$MEMORY_DYNAMIC_COMPONENTS视图确认当前“缓冲区大小”，
然后设定db_cache_size小于该大小的大小。
例：
select COMPONENT,CURRENT_SIZE from
V$MEMORY_DYNAMIC_COMPONENTS where COMPONENT='DEFAULT buffer cache'
可以通过如下的测试用例验证结论。
SQL> show parameter MEMORY
NAME TYPE VALUE
------------------------------------ ------------------------------------------------------------------------------------------------ ------------------------------
hi_shared_memory_address integer 0
memory_max_target big integer 1G
memory_target big integer 1G
shared_memory_address integer 0
SQL> show parameter sga
NAME TYPE VALUE
------------------------------------ ------------------------------------------------------------------------------------------------ ------------------------------
lock_sga boolean FALSE
pre_page_sga boolean FALSE
sga_max_size big integer 628M
sga_target big integer 0
SQL> l
1* select * from V$MEMORY_RESIZE_OPS where parameter = 'db_cache_size' order by start_time desc
SQL> /
COMPONENT OPER_TYPE OPER_MODE PARAMETER INITIAL_SIZE TARGET_SIZE FINAL_SIZE STATUS START_TIME END_TIME
------------------------------ --------------- ---------- ------------------------- ------------ ----------- ----------- --------------------------- ------------------------------ ------------------------------
DEFAULT buffer cache SHRINK IMMEDIATE db_cache_size 16777216 12582912 12582912 COMPLETE 2015/06/24 23:11:07 2015/06/24 23:11:07 ★★★★★★
DEFAULT buffer cache SHRINK IMMEDIATE db_cache_size 20971520 16777216 16777216 COMPLETE 2015/06/01 13:03:44 2015/06/01 13:03:44
DEFAULT buffer cache SHRINK IMMEDIATE db_cache_size 25165824 20971520 20971520 COMPLETE 2015/06/01 13:03:42 2015/06/01 13:03:42
DEFAULT buffer cache SHRINK IMMEDIATE db_cache_size 29360128 25165824 25165824 COMPLETE 2015/06/01 10:37:26 2015/06/01 10:37:26
DEFAULT buffer cache SHRINK DEFERRED db_cache_size 33554432 29360128 29360128 COMPLETE 2015/06/01 09:56:25 2015/06/01 09:56:25
DEFAULT buffer cache SHRINK DEFERRED db_cache_size 37748736 33554432 33554432 COMPLETE 2015/06/01 09:49:55 2015/06/01 09:49:55
DEFAULT buffer cache SHRINK DEFERRED db_cache_size 41943040 37748736 37748736 COMPLETE 2015/06/01 09:42:25 2015/06/01 09:42:25
DEFAULT buffer cache SHRINK IMMEDIATE db_cache_size 46137344 41943040 41943040 COMPLETE 2015/06/01 09:36:48 2015/06/01 09:36:48
DEFAULT buffer cache SHRINK IMMEDIATE db_cache_size 50331648 46137344 46137344 COMPLETE 2015/06/01 09:36:39 2015/06/01 09:36:39
DEFAULT buffer cache SHRINK IMMEDIATE db_cache_size 54525952 50331648 50331648 COMPLETE 2015/06/01 09:36:39 2015/06/01 09:36:39
DEFAULT buffer cache INITIALIZING IMMEDIATE db_cache_size 58720256 54525952 54525952 COMPLETE 2015/06/01 09:36:37 2015/06/01 09:36:38
ASM Buffer Cache STATIC db_cache_size 0 0 0 COMPLETE 2015/06/01 09:36:37 2015/06/01 09:36:37
DEFAULT buffer cache STATIC db_cache_size 0 54525952 54525952 COMPLETE 2015/06/01 09:36:37 2015/06/01 09:36:37
DEFAULT buffer cache STATIC IMMEDIATE db_cache_size 58720256 54525952 54525952 COMPLETE 2015/06/01 09:36:37 2015/06/01 09:36:37
14 rows selected.
SQL> ALTER SYSTEM SET db_cache_size=1258291 scope=spfile;
System altered.
SQL> ALTER SYSTEM SET db_cache_size=12582911 scope=spfile;
System altered.
SQL> ALTER SYSTEM SET db_cache_size=12582913 scope=spfile;
ALTER SYSTEM SET db_cache_size=12582913 scope=spfile
*
ERROR at line 1:
ORA-32017: failure in updating SPFILE
ORA-00384: Insufficient memory to grow cache
SQL> select CURRENT_SIZE ,COMPONENT from V$MEMORY_DYNAMIC_COMPONENTS;
CURRENT_SIZE COMPONENT
------------ ------------------------------
83886080 shared pool
4194304 large pool
4194304 java pool
8388608 streams pool
658505728 SGA Target
12582912 DEFAULT buffer cache ★★★★
0 KEEP buffer cache
0 RECYCLE buffer cache
0 DEFAULT 2K buffer cache
0 DEFAULT 4K buffer cache
0 DEFAULT 8K buffer cache
0 DEFAULT 16K buffer cache
0 DEFAULT 32K buffer cache
536870912 Shared IO Pool
415236096 PGA Target
0 ASM Buffer Cache
16 rows selected.
SQL>