利用shell脚本自动获取awr报表

        观察Oracle数据库性能，oracle自带的awr功能为我们提供了一个近乎完美的解决方案，通过awr特性我们可以随时从数据库提取awr报告。通过报告可以了解一个系统的整个运行情况，生成的报告包括多个部分。

如何获取awr报告？

1. 通过awrrpt.sql脚本执行
2. 通过调用ORALCE的包dbms_workload_repository.awr_report_html/dbms_workload_repository.awr_report_text

获取awr报告通常是采用html形式；打开页面比较友好；也方便查看。

    通过方法1 awrrpt.sql脚本执行需要我们提供一些交互信息。操作也比较简单。本文通过shell脚本中来实现自动产生指定时段的awr报告。采用方法2。

1.  产生awr report 的sql脚本 autoawr.sql

SET ECHO OFF;  
SET VERI OFF;  
SET FEEDBACK OFF;  
SET TERMOUT ON;  
SET HEADING OFF;  
   
VARIABLE dbid NUMBER;  
VARIABLE inst_num NUMBER;  
VARIABLE bid NUMBER;  
VARIABLE eid NUMBER;  

BEGIN  
  SELECT MIN (snap_id) INTO :bid FROM dba_hist_snapshot WHERE TO_CHAR (end_interval_time, 'yyyymmdd') = TO_CHAR (SYSDATE-1, 'yyyymmdd');  
  
  SELECT MAX (snap_id) INTO :eid FROM dba_hist_snapshot WHERE TO_CHAR (begin_interval_time,'yyyymmdd') = TO_CHAR (SYSDATE-1, 'yyyymmdd');  
  
  SELECT dbid INTO :dbid FROM v$database;  
  
  SELECT instance_number INTO :inst_num FROM v$instance;  
END;  
/  
  
set pagesize 0;
set linesize 121;

COLUMN report_name NEW_VALUE report_name NOPRINT;

SELECT instance_name || '_awrrpt_' || instance_number || '_' || b.timestamp || '.' || 'html'  
          report_name  
  FROM v$instance a,  
       (SELECT TO_CHAR (begin_interval_time, 'yyyymmdd') timestamp  
          FROM dba_hist_snapshot  
         WHERE snap_id = :eid) b;  
  
SET TERMOUT OFF;  
SPOOL $AWR_DIR/&report_name;  
  
SELECT output  
  FROM TABLE (DBMS_WORKLOAD_REPOSITORY.awr_report_html(:dbid,  
                                                 :inst_num,  
                                                 :bid,  
                                                 :eid));  
SPOOL OFF;  
SET TERMOUT ON;  
CLEAR COLUMNS SQL;  
TTITLE OFF;  
BTITLE OFF;  
REPFOOTER OFF;  
  
UNDEFINE report_name

2. 产生awr report 的shell脚本autoawr.sh

#!/bin/bash

if [ -f ~/.bash_profile ]; then  
    source ~/.bash_profile  
fi 

export AWR_CMD=/home/oracle/awr
export AWR_DIR=/home/oracle/awr/report   
RETENTION=31 

# ----------------------------------------------  
# Generate awr report  
# ----------------------------------------------  
$ORACLE_HOME/bin/sqlplus / as sysdba<<EOF   
@${AWR_CMD}/autoawr.sql;  
exit;  
EOF

# ------------------------------------------------  
# Removing files older than $RETENTION parameter   
# ------------------------------------------------  
  
find ${AWR_DIR} -name "*awrrpt*" -mtime +$RETENTION -exec rm {} ;  
exit