觀察Oracle數據庫性能，oracle自帶的awr功能為我們提供了一個近乎完美的解決方案，通過awr特性我們可以隨時從數據庫提取awr報告。通過報告可以了解一個系統的整個運行情況，生成的報告包括多個部分。

如何獲取awr報告？

1. 通過awrrpt.sql腳本執行
2. 通過調用ORALCE的包dbms_workload_repository.awr_report_html/dbms_workload_repository.awr_report_text

獲取awr報告通常是采用html形式；打開頁面比較友好；也方便查看。

通過方法1 awrrpt.sql腳本執行需要我們提供一些交互信息。操作也比較簡單。本文通過shell腳本中來實現自動產生指定時段的awr報告。采用方法2。

1. 產生awr report 的sql腳本 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. 產生awr report 的shell腳本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

利用shell腳本自動獲取awr報表