生产库个人用户大量使用并行会导致数据库负载忽高忽低，频繁分析，浪费时间，且可能会出现大量直接路径读，影响数据库整体性能（此问题跟他们讲了也不听，不胜其烦）
之前写过使用resource_managed进行并行的限制，该方法适用于数据库体量较小，连接和用户数量少的库，大体量的库会有latch产生（这里不过多阐述）
还有就是使用profile中的用户会话数量进行限制，这个会影响到业务人员开多个窗口的问题
无奈之下编写个人用户并行限制脚本
使用前提：
1.使用此药的数据库生产用户和个人用户有严格的权限划分，比如不同的profile
2.使用并行的用户会话会被kill掉，该用户被锁定5分钟后自动解锁
3.需要提前创建表 user_auto_lock，用户名请自定（稍微改下脚本即可）
#！/bin/bash
# File: auto_lock_parallel_user.sh
# Version: 1.0
#author jiacheng
#The concurrent user is locked and automatically unlocked after five minutes
##############################################################################
###########################---usage---########################################
#one node config!!!
#first: create table dbmt.user_auto_lock (exectime date default sysdate,sid number(10),serial number(7),inst_id number(3),username varchar2(100),sql_id varchar2(100),degree number(3),req_degree number(3),slaves number(3));
#linux: */1 7-20 * * * sh /home/oracle/scripts/auto_lock_parallel_user.sh >> /home/oracle/scripts/auto_lock_parallel_user.log
#HPUX: * 7-20 * * * sh /home/oracle/scripts/auto_lock_parallel_user.sh >> /home/oracle/scripts/auto_lock_parallel_user.log
###############################################################################
echo "The current working directory: $PWD"
echo "Shell: $0"
if [[ -f ~/.profile ]]
then
. ~/.profile
fi
if [[ -f ~/.bash_profile ]]
then
. ~/.bash_profile
fi
USERID=`/usr/bin/id -u -nr`
if [ $? -ne 0 ]
then
echo "ERROR: unable to determine uid"
exit 99
fi
echo "current user: ${USERID}"
if [ "${USERID}" != "oracle" ]
then
echo "ERROR: This script must be run as oracle"
exit 98
fi
if [ ! $ORACLE_SID ]
then
echo "Error: No ORACLE_SID set or provided as an argument"
exit 97
else
echo "current ORACLE_SID: ${ORACLE_SID}"
fi
STTIME=`date "+%Y-%m-%d %H:%M:%S"`
echo $STTIME
LOGFILE=./auto_lock_parallel_user.log
unset SQLPATH
unset ORACLE_PATH
unlock_user=`sqlplus -S '/ as sysdba' <<EOF >>$LOGFILE
set serveroutput on;
begin
for r in (select username from dbmt.user_auto_lock where exectime<SYSDATE-5/1440 and exectime>SYSDATE-7/1440)
loop
begin
dbms_output.put_line('alter user ' || r.username || ' account unlock');
EXECUTE IMMEDIATE 'alter user ' || r.username || ' account unlock';
exception
when others then
dbms_output.put_line('ERROR ' || SQLCODE || ' ' || SQLERRM);
end;
end loop;
end;
/
exit;
EOF
`
echo "${unlock_user}"
function get_xinxi_sql
{
sqlplus -S '/ as sysdba' <<EOF
set pagesize 0 feedback off verify off heading off echo off
set linesize 2000;
select sid,serial,qcinst_id,username from (select pxs.qcsid sid,pxs.qcserial# serial,pxs.qcinst_id,ses.username,count(*) slaves FROM gv$px_session pxs, gv$session ses, gv$px_process p,dba_users us WHERE ses.sid = pxs.sid AND ses.serial# = pxs.serial# AND p.sid = pxs.sid AND pxs.inst_id = ses.inst_id AND ses.inst_id = p.inst_id and ses.username=us.username AND pxs.req_degree IS NOT NULL and us.profile='JFZZZ' GROUP BY qcsid,qcserial#,pxs.qcinst_id,ses.username ORDER BY pxs.qcinst_id,slaves DESC);
insert into dbmt.user_auto_lock(exectime,sid,serial,inst_id,username,sql_id,degree,req_degree,slaves) select sysdate,pxs.qcsid sid,pxs.qcserial# serial,pxs.qcinst_id,ses.username,ses.sql_id,pxs.degree,pxs.req_degree,count(*) slaves FROM gv$px_session pxs, gv$session ses, gv$px_process p,dba_users us WHERE ses.sid = pxs.sid AND ses.serial# = pxs.serial# AND p.sid = pxs.sid AND pxs.inst_id = ses.inst_id AND ses.inst_id = p.inst_id and ses.username=us.username AND pxs.req_degree IS NOT NULL and us.profile='JFZZZ' GROUP BY qcsid,qcserial#,pxs.qcinst_id,ses.username,ses.sql_id,pxs.degree,pxs.req_degree ORDER BY pxs.qcinst_id,slaves DESC;
commit;
exit;
EOF
}
px_xinxi=`get_xinxi_sql`
echo "${px_xinxi}"
if [ ! -n "$px_xinxi" ]
then
echo "personal user no parallel session,exit"
exit 88
else
echo "discovery parallel session!!! next"
fi
echo "$px_xinxi" > current_parallel.log
kill_sql=`
while read s1 s2 s3 s4
do
echo "alter system kill session'$s1,$s2,@$s3' immediate;"
done < current_parallel.log`
echo "${kill_sql}" >> $LOGFILE
kill_parallel_session="sqlplus -S '/ as sysdba'
set sqlblanklines on
set pagesize 0 verify off heading off echo off
"${kill_sql}"
exit;
"
echo "${kill_parallel_session}" | sh >> $LOGFILE
if [ $? -eq 0 ]
then
echo "personal user parallel killed"
else
echo "$kill_parallel_session"
fi
lock_sql=`while read user
do
echo $user | awk '{print "alter user " $4 " account lock;"}'
done < current_parallel.log
`
echo "$lock_sql"
lock_user="sqlplus -S '/ as sysdba'
set pagesize 0 verify off heading off echo off
"${lock_sql}"
exit;
"
echo "${lock_user}" | sh >> $LOGFILE
if [ $? -eq 0 ]
then
echo "parallel user locked"
else
echo "ERROR"
fi
--编写不易，且用且珍惜，转载请注明来处