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