1、top memory
ps -eo size,pid,user,command --sort -size | awk '{ hr=$1/1024 ; printf("%13.2f Mb ",hr) } { for ( x=4 ; x
ps aux | awk '{print $6/1024 " MB\t\t" $11}' | sort -n
ps aux | head -1;ps aux |grep -v PID |sort -rn -k +4 | head -20
ps -eo pmem,pcpu,rss,vsize,args | sort -k 1 -n -r | less
2、查找替换
#linux
sed -i "s/EXCLUDE INSTR 'GRANT'/EXCLUDE INSTRWORDS 'GRANT REVOKE'/g" *.prm ------将所有 prm结尾的文件中，EXCLUDE INSTR 'GRANT'替换为EXCLUDE INSTRWORDS 'GRANT REVOKE'
sed -i "s/.3.74/.3.14/g" *.ini
sed -i "s/.3.14\/db/.3.12\/db/g" *.ini
#aix
find . -name '*.prm' | xargs perl -pi -e "s|EXCLUDE INSTRWORDS 'GRANT REVOKE'|EXCLUDE INSTR 'GRANT',EXCLUDE INSTR 'REVOKE'|g"
3、内存使用率
free -m | sed -n '2p' | awk '{print "used mem is "$3"M,total mem is "$2"M,used percent is "$3/$2*100"%"}'
ps aux | awk -F' ' '{sum+=$6};END{print sum}' ---所有内存之和
4、设置时间格式
export TIME_STYLE='+%Y/%m/%d %H:%M:%S'
5、各个目录的使用率，可以设置深度
du -h -x --max-depth=1
6、查看活动会话
select t.sql_id,
t.USERNAME,
t.EVENT,
t.MACHINE,
t.SID,
t.BLOCKING_SESSION bs,
(select sql_text
from v$sql s
where s.sql_id = t.sql_id
and rownum = 1) sql_text
from v$session t
where t.STATUS = 'ACTIVE'
and t.type='USER'
--and t.SERVICE_NAME not in ('SYSUSERS', 'SYSBACKGROUND')
and t.sql_id is not null
--and t.MODULE = 'JDBC Thin Client'
7、实时监控SQL
select t.SQL_ID,
t.SQL_TEXT,
t.SQL_EXEC_ID exid,
t.STATUS,
t.USERNAME uname,
round(t.ELAPSED_TIME / 1000000, 2) eltm,
t.BUFFER_GETS buf,
t.DISK_READS dr,
to_char(t.SQL_EXEC_START, 'yyyy-mm-dd hh24:mi:ss') exec_start,
t.MODULE
from v$sql_monitor t
where t.SERVICE_NAME not in ('SYSUSERS', 'SYSBACKGROUND')
and t.SQL_TEXT not like 'explain plan%'
order by t.LAST_REFRESH_TIME desc;
8、活动会话的历史
select cast(t.SAMPLE_TIME as date) sam_time,
t.SESSION_ID sid,
t.sql_id,
t.EVENT,
t.BLOCKING_SESSION bs,
(select sql_text
from v$sql t1
where t1.sql_id = t.sql_id
and rownum = 1) sql_text,
t.TIME_WAITED tw,
t.MACHINE,
t.WAIT_TIME wt
from v$active_session_history t
where t.sample_time > SYSDATE - 2 / (24 * 60)
order by t.SAMPLE_TIME
9、SQL的执行信息
select t.CHILD_NUMBER child_num,
t.EXECUTIONS execs,
t.ROWS_PROCESSED r_proc,
t.BUFFER_GETS buf,
round(t.BUFFER_GETS / nvl(t.EXECUTIONS,1)) buf_p,
t.ELAPSED_TIME ela_time,
round(t.ELAPSED_TIME / nvl(t.EXECUTIONS,1) / 1000000) ela_p,
t.PLAN_HASH_VALUE plan_hv,
t.SQL_PROFILE sp,
t.SQL_PLAN_BASELINE spb,
t.SQL_Patch spc,
t.LAST_ACTIVE_TIME,
t.FIRST_LOAD_TIME,
t.PROGRAM_ID progid,
t.PROGRAM_LINE# prog_line
from v$sql t
where t.sql_id = 'faqmvjk84j6mk'
order by t.BUFFER_GETS / nvl(t.EXECUTIONS,1)
10、长事务和进度情况
select t.SID,
t.USERNAME,
t.SQL_ID,
t.SQL_PLAN_HASH_VALUE,
case
when opname like '%aggregate%' then
'total'
else
opname
end opname,
trunc(sofar * 100 / totalwork, 2) || '%' progress,
units
from v$session_longops t
where totalwork > sofar
11、通过OS的pid查找会话和SQL
select t1.sid,
t2.spid,
t1.SERIAL#,
t1.USERNAME,
t1.STATUS,
t1.OSUSER,
t1.MACHINE,
t1.PORT,
t1.PROGRAM,
t1.SQL_ID,
t1.BLOCKING_SESSION bs,
t2.PNAME
from vsession t1, vprocess t2
where t1.PADDR = t2.ADDR
and (t2.SPID = '1234' or t1.sid='1234')
12、查找锁的信息
select sess.sid,
sess.serial#,
lo.oracle_username,
lo.os_user_name,
ao.object_name,
lo.locked_mode
from vlocked_object lo, dba_objects ao, vsession sess
where ao.object_id = lo.object_id
and lo.session_id = sess.sid;
--alter system kill session '738,1429';