通过shell脚本监控oracle session

最近数据库碰到了连接紧张的问题，想通过一个脚本对数据库的session情况一目了然。以下是自己写的脚本。实现的效果如下。对session的总体情况，那些program主要在占用，每个用户所拥有的session（active,inactive,killed,sniped...)都能够一目了然。
STATUS          CNT
-------- ----------
KILLED          553
SNIPED         2028
ACTIVE           44
INACTIVE       6097
         ----------
sum              8722
.

PROGRAM                                    CNT STATUS
----------------------------------- ---------- --------
JDBC Thin Client                                  2316 INACTIVE
program1@machine01 (TNS V1-V3)         659 INACTIVE
program2@machine02 (TNS V1-V3)         572 INACTIVE
program4@machine01 (TNS V1-V3)         462 SNIPED
program3@machine01 (TNS V1-V3)         449 INACTIVE
program4@machine02 (TNS V1-V3)         391 INACTIVE
program1@machine01 (TNS V1-V3)         349 SNIPED
JDBC Thin Client                                   342 SNIPED
program2@machine01 (TNS V1-V3)           268 INACTIVE
                                    ----------
sum                                                       5808
.


USERNAME             TOTAL_CNT     ACTIVE   INACTIVE     KILLED     SNIPED program1 program2 program3
--------------- ---------- ---------- ---------- ---------- ---------- ---------------- -------------- -----------
TESTUSER46               428          0            174        253          1              114            181          32
TESTUSER5                424          0            309          0        115              137            188          35
TESTUSER2                422          0              8        300        114              143            172          35
TESTUSER29               414          1            226          0        187              165            102          47
TESTUSER6                399          0            268          0        131               82            196          35
TESTUSER9                394          0            281          0        113              131            162          35
TESTUSER7                358          0            232          0        126               67            192          36
TESTUSER23               345          0            212          0        133               52            178          35
TESTUSER21               338          0            229          0        109               79            161          35
TESTUSER25               330          0            216          0        114               66            156          34
TSTAPP1                    313          0            195          0        118               31            182           3
TESTUSER30               299          0            298          0          1              110             92          32
TESTUSER22               297          0            286          0         11              106            112          32
TSTAPP12                   287          0            164          0        123               66            126          35
TESTUSER31               287          0            286          0          1              107            104          32
TESTUSER42               265          0            262          0          3               68            125          32
TESTUSER11               254          0            250          0          4               52            105          32
TESTUSER52               247          0            158          0         89                4            170          33
TSTAPP16                   241          0            232          0          9               54            110          32
TSTAPP8                    220          0            220          0          0               47            102          32
TSTAPP2                    220          0            215          0          5               74             93          32
TESTUSER32               149          0            149          0          0                2             76          32
TESTUSER51               134          0             18          0        116               30             77           1
TESTUSER3                104          0             17          0         87               34             50           3
TESTUSER45                95          0              0          0         95               12             65           0
TESTUSER44                69          0             21          0         48               22             31           3



--附上脚本内容：

sqlplus -s $DB_CONN_STR@$SH_DB_SID <<EOF
set feed off
set verify off
set line 132
set pages 200


col username format a15
col sql_id format a20
col sql_address format a20
col machine format a30
col osuser format a15
col logon_time format a10
col program format a35
break on report
compute sum of  cnt  on report
select status,count(*) cnt from v$session group by status;
prompt .


select program,cnt,status from (select program,count(*) cnt,status from v$session group by program,status order by cnt desc) where rownum<10;


prompt .
  select username,
      sum(cnt) total_cnt,
      sum(decode(status,'ACTIVE', cnt,0)) ACTIVE,
      sum(decode(status,'INACTIVE', cnt,0)) INACTIVE,
      sum(decode(status,'KILLED', cnt,0)) KILLED,
      sum(decode(status,'SNIPED', cnt,0)) SNIPED,
     $issue_program1 "JDBC Thin Client",
     $issue_program2  "program1",
     $issue_program3  "program2"
     from (select program,username,status,count(*) cnt from V$SESSION   group by program,username,status  ) 
    group by username having sum(cnt)>50 order by total_cnt desc;


EOF
exit