环境:
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
问题&解决:
SQL> select count(*) from MV_EDR_BASE_V;
在查询物化视图时,发生了os thread startup等待事件,并一直HANG住.
SQL> show parameter sga
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
lock_sga boolean FALSE
pre_page_sga boolean TRUE
sga_max_size big integer 40G
sga_target big integer 0
将pre_page_sgaFALSE
alter system set pre_page_sga=FALSE scope=spfile;
restart instant;
再次执行SQL,等待消失...
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