ORA-04031:unable to allocate 4120 bytes of shared memory ‘obj stat mem’故障解决
客户报表库，HP-ux B11.31 IA64 FOR Oracle 10.2.0.5.0 RAC系统短信过滤alert日志告警
ORA-00604: error occurred at recursive SQL level 1
ORA-04031:unable to allocate 4120 bytes of shared memory ("shared pool","select f.file#, f.block#, f....","Typecheck","kgghteInit")
询问客户SGA、share pool、主机资源等相关情况
SQL> show parameter sga
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
lock_sga boolean TRUE
pre_page_sga boolean FALSE
sga_max_size big integer 60G
sga_target big integer 0
SQL> show parameter pool
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
buffer_pool_keep string
buffer_pool_recycle string
global_context_pool_size string
java_pool_size big integer 512M
large_pool_size big integer 512M
olap_page_pool_size big integer 0
shared_pool_reserved_size big integer 644245094
shared_pool_size big integer 12G
streams_pool_size big integer 416M
SGA总大小60G，share pool总大小12G。有了这个直观的感受，随即将4031收集相关信息的脚本4031_OK-ForAll.sql发给客户，收集现在内存使用情况，脚本内容如下：
/**********************************************************************
* File: 4031.sql
* Date: 2012/01/1
*
* Modifications:
* 2012/02/12 Changed v1
*********************************************************************/
spool spinfo.txt
SET PAGESIZE 1024
SET LINESIZE 2000
set echo off;
set feedback off;
set heading on;
set trimout on;
set trimspool on;
COL BYTES FORMAT 999999999999999
COL CURRENT_SIZE FORMAT 999999999999999
/* Script Run TimeStamp */
set serveroutput on;
exec dbms_output.put_line('Script Run TimeStamp');
select to_char(sysdate, 'dd-MON-yyyy hh24:mi:ss') "Script Run TimeStamp" from dual;
set serveroutput on;
exec dbms_output.put_line('Instance Startup Time');
/*Instance Startup time */
select to_char(startup_time, 'dd-MON-yyyy hh24:mi:ss') "Instance Startup Time" from v$instance;
/* shared pool related hidden parameter */
set serveroutput on;
exec dbms_output.put_line('shared pool related hidden parameter ');
col name format a40
col value format a80;
select nam.ksppinm NAME,val.KSPPSTVL VALUE from x$ksppi nam,x$ksppsv val where nam.indx = val.indx and nam.ksppinm like '%shared%' order by 1;
/* SUB Pool Number */
set serveroutput on;
exec dbms_output.put_line('SUB Pool Number ');
col 'Parameter' format a40
col 'Session Value' format a40;
col 'Instance Value' format a40;
select a.ksppinm "Parameter",
b.ksppstvl "Session Value",
c.ksppstvl "Instance Value"
from sys.x$ksppi a, sys.x$ksppcv b, sys.x$ksppsv c
where a.indx = b.indx and a.indx = c.indx
and a.ksppinm like '%_kghdsidx_count%';
/* Each Subpool Size */
set serveroutput on;
exec dbms_output.put_line('Each Subpool Size');
select ksmchidx poolnumer , sum(ksmchsiz) poolsize
from x$ksmsp
group by ksmchidx ;
/* Researved Shared Pool 4031 information */
set serveroutput on;
exec dbms_output.put_line('Researved Shared Pool 4031 information');
select REQUEST_FAILURES, LAST_FAILURE_SIZE from V$SHARED_POOL_RESERVED;
/* Reaserved Shared Pool Reserved 4031 information */
set serveroutput on;
exec dbms_output.put_line('Reaserved Shared Pool 4031 information');
select REQUESTS, REQUEST_MISSES, free_space, avg_free_size, free_count, max_free_size from V$SHARED_POOL_RESERVED;
/* Current SGA Buffer & Pool sizes */
set serveroutput on;
exec dbms_output.put_line('Current SGA Buffer Pool sizes');
select component, current_size from v$sga_dynamic_components;
/* Shared Pool Memory Allocations by Size */
set serveroutput on;
exec dbms_output.put_line('Shared Pool Memory Allocations by Size');
select name, bytes from v$sgastat
where pool = 'shared pool' and (bytes > 999999 or name = 'free memory')
order by bytes desc;
set serveroutput on;
exec dbms_output.put_line('show component of shared pool which is bigger than 10MB');
select name, round((bytes/1024/1024),0) "more than 10" from v$sgastat where pool='shared pool' and bytes > 10000000 order by bytes desc;
select sum(bytes) "SHARED POOL TOTAL SIZE" from v$sgastat where pool='shared pool';
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