Statspack是Oracle 9i时代的产物，对于监控与分析数据库性能有着跨里程碑的意义，是AWR的前身。在Oracle 10g后AWR取代了statspack。尽管如此，awr异常或者需要调试包license的情况下statpack依旧是不错的选择。然而在RAC环境中，statspack并不支持，需要单独的进行配置以及使用job来进行管理。本文描述的则是通过在RAC环境下创建service，以及job来达到各节点同时产生snapshot的效果。
一、演示环境
SUSE11a:oracle:orcl101 > cat /etc/issue
Welcome to SUSE Linux Enterprise Server 11 SP3 (x86_64) - Kernel \r (\l).
suse11a:oracle:orcl101 > sqlplus -v
SQL*Plus: Release 10.2.0.5.0 - Production
suse11a:oracle:orcl101 > $ORA_CRS_HOME/bin/crsctl query crs activeversion
CRS active version on the cluster is [10.2.0.5.0]
二、配置Statspack
1)首先添加service
$ srvctl add service -d orcl10 -s statspack_suse11a_srvc -r orcl101
$ srvctl add service -d orcl10 -s statspack_suse11b_srvc -r orcl102
$ srvctl start service -d orcl10 -s statspack_suse11a_srvc
$ srvctl start service -d orcl10 -s statspack_suse11b_srvc
$ srvctl status service -d orcl10
Service orcl10_srv is running on instance(s) orcl102, orcl101
Service statspack_suse11a_srvc is running on instance(s) orcl101
Service statspack_suse11b_srvc is running on instance(s) orcl102
$ srvctl config service -d orcl10
orcl10_srv PREF: orcl102 orcl101 AVAIL:
statspack_suse11a_srvc PREF: orcl101 AVAIL:
statspack_suse11b_srvc PREF: orcl102 AVAIL:
$ lsnrctl status
.........
Service "statspack_suse11a_srvc" has 1 instance(s).
Instance "orcl101", status READY, has 2 handler(s) for this service...
Service "statspack_suse11b_srvc" has 1 instance(s).
Instance "orcl102", status READY, has 1 handler(s) for this service...
.............
2)配置statspack
conn / as sysdba
create tablespace perfstat datafile '+ASM_DATA' size 500m autoextend on;
@?/rdbms/admin/spcreate
GRANT EXECUTE ON DBMS_LOCK TO perfstat;
GRANT CREATE JOB TO perfstat;
GRANT EXECUTE ON sys.DBMS_SCHEDULER TO perfstat;
GRANT EXECUTE ON sys.DBMS_ISCHED TO perfstat;
3)创建job class
BEGIN
DBMS_SCHEDULER.create_job_class (
job_class_name => 'statspack_suse11a_class',
service => 'statspack_suse11a_srvc');
DBMS_SCHEDULER.create_job_class (
job_class_name => 'statspack_suse11b_class',
service => 'statspack_suse11b_srvc');
END;
/
SQL> select job_class_name, service from dba_scheduler_job_classes;
JOB_CLASS_NAME SERVICE
------------------------------ -------------------------------------------------
DEFAULT_JOB_CLASS
AUTO_TASKS_JOB_CLASS
STATSPACK_SUSE11A_CLASS statspack_suse11a_srvc
STATSPACK_SUSE11B_CLASS statspack_suse11b_srvc
GRANT EXECUTE ON sys.STATSPACK_SUSE11A_CLASS TO perfstat;
GRANT EXECUTE ON sys.STATSPACK_SUSE11B_CLASS TO perfstat;
4)创建用于同步节点的过程
conn perfstat/perfstat
CREATE OR REPLACE PROCEDURE db_proc_rac_statspack
AS
w_status NUMBER (38);
w_handle VARCHAR2 (60);
w_snap_level NUMBER;
BEGIN
w_snap_level := 7;
sys.DBMS_LOCK.allocate_unique (lockname => 'Synchronize Statspack',
lockhandle => w_handle);
w_status :=
sys.DBMS_LOCK.request (lockhandle => w_handle,
lockmode => DBMS_LOCK.x_mode,
timeout => 300, -- seconds, default is dbms_lock.maxwait
release_on_commit => FALSE -- which is the default
);
IF (w_status = 0)
THEN
DBMS_OUTPUT.put_line (
TO_CHAR (SYSDATE, 'dd hh24:mi:ss')
|| ': Acquired lock, running statspack');
statspack.snap (w_snap_level);
DBMS_OUTPUT.put_line (
TO_CHAR (SYSDATE, 'dd hh24:mi:ss') || ': Snapshot completed');