Oracle环境准备:
去阿里云购买云服务器,镜像选择oracle11g的
这个链接https://market.aliyun.com/products/53398003/cmjj014888.html?spm=5176.204674.1085795.1.7b1f3eadluPNmc
突发型实列,非常便宜,1毛到2毛每分钟,如果不是,区域可以更改一下。

 

因Oracle数据库配置文件中含有主机名信息,而主机名随实例不同而改变,因此镜像安装好之后需要更改Oracle配置文件中主机名信息; 
登陆SSH管理终端,切换到oracle账户修改配置文件,
vim /u01/app/oracle/product/11.2.0/db1/network/admin/listener.ora
(ADDRESS = (PROTOCOL = TCP)(HOST = 这里改为主机名)(PORT = 1521))

切换到root下面重启动
service oracle start  
查看监听状态
lsnrctl status
oracle登陆授权

sqlplus /nolog
conn / as sysdba

CREATE USER ZABBIX
 IDENTIFIED BY ZABBIX DEFAULT TABLESPACE SYSTEM
 TEMPORARY TABLESPACE TEMP
 PROFILE DEFAULT
 ACCOUNT UNLOCK;

GRANT CONNECT TO ZABBIX;
GRANT RESOURCE TO ZABBIX;
ALTER USER ZABBIX DEFAULT ROLE ALL;
GRANT SELECT ANY TABLE TO ZABBIX;
GRANT CREATE SESSION TO ZABBIX;
GRANT SELECT ANY DICTIONARY TO ZABBIX;
GRANT UNLIMITED TABLESPACE TO ZABBIX;
GRANT SELECT ANY DICTIONARY TO ZABBIX;


CREATE USER ZABBIX
IDENTIFIED BY ZABBIX
DEFAULT TABLESPACE USERS
TEMPORARY TABLESPACE TEMP
PROFILE DEFAULT
ACCOUNT UNLOCK;
GRANT ALTER SESSION TO ZABBIX;
GRANT CREATE SESSION TO ZABBIX;
GRANT CONNECT TO ZABBIX;
ALTER USER ZABBIX DEFAULT ROLE ALL;
GRANT SELECT ON V_$INSTANCE TO ZABBIX;
GRANT SELECT ON DBA_USERS TO ZABBIX;
GRANT SELECT ON V_$LOG_HISTORY TO ZABBIX;
GRANT SELECT ON V_$PARAMETER TO ZABBIX;
GRANT SELECT ON SYS.DBA_AUDIT_SESSION TO ZABBIX;
GRANT SELECT ON V_$LOCK TO ZABBIX;
GRANT SELECT ON DBA_REGISTRY TO ZABBIX;
GRANT SELECT ON V_$LIBRARYCACHE TO ZABBIX;
GRANT SELECT ON V_$SYSSTAT TO ZABBIX;
GRANT SELECT ON V_$PARAMETER TO ZABBIX;
GRANT SELECT ON V_$LATCH TO ZABBIX;
GRANT SELECT ON V_$PGASTAT TO ZABBIX;
GRANT SELECT ON V_$SGASTAT TO ZABBIX;
GRANT SELECT ON V_$LIBRARYCACHE TO ZABBIX;
GRANT SELECT ON V_$PROCESS TO ZABBIX;
GRANT SELECT ON DBA_DATA_FILES TO ZABBIX;
GRANT SELECT ON DBA_TEMP_FILES TO ZABBIX;
GRANT SELECT ON DBA_FREE_SPACE TO ZABBIX;
GRANT SELECT ON V_$SYSTEM_EVENT TO ZABBIX;

exec dbms_network_acl_admin.create_acl(acl => 'resolve.xml',description => 'resolve acl', principal =>'ZABBIX', is_grant => true, privilege => 'resolve');
exec dbms_network_acl_admin.assign_acl(acl => 'resolve.xml', host =>'*');
commit;
sqlplush ZABBIX/ZABBIX 就可以登陆命令行

 


1、监控事例的等待
select event,sum(decode(wait_Time,0,0,1)) "Prev", sum(decode(wait_Time,0,1,0)) "Curr",count(*) "Tot" from v$session_Wait group by event order by 4;  

2、回滚段的争用情况
select name, waits, gets, waits/gets "Ratio" from v$rollstat a, v$rollname b where a.usn = b.usn;    

3、监控表空间的 I/O 比例
select df.tablespace_name name,df.file_name "file",f.phyrds pyr,f.phyblkrd pbr,f.phywrts pyw, f.phyblkwrt pbw from v$filestat f, dba_data_files df where f.file# = df.file_id order by df.tablespace_name;     

4、监控文件系统的 I/O 比例
select substr(a.file#,1,2) "#", substr(a.name,1,30) "Name", a.status, a.bytes, b.phyrds, b.phywrts from v$datafile a, v$filestat b where a.file# = b.file#;  

5、在某个用户下找所有的索引########这个应该和用户数有关######
select user_indexes.table_name, user_indexes.index_name,uniqueness, column_name from user_ind_columns, user_indexes where user_ind_columns.index_name = user_indexes.index_name and user_ind_columns.table_name = user_indexes.table_name order by user_indexes.table_type, user_indexes.table_name,user_indexes.index_name, column_position;   

6、监控 SGA 的命中率
select a.value + b.value "logical_reads", c.value "phys_reads",round(100 * ((a.value+b.value)-c.value) / (a.value+b.value)) "BUFFER HIT RATIO" from v$sysstat a, v$sysstat b, v$sysstat c where a.statistic# = 38 and b.statistic# = 39 and c.statistic# = 40;    

7、监控 SGA 中字典缓冲区的命中率
select parameter, gets,Getmisses , getmisses/(gets+getmisses)*100 "miss ratio",(1-(sum(getmisses)/ (sum(gets)+sum(getmisses))))*100 "Hit ratio" from v$rowcache where gets+getmisses <>0 group by parameter, gets, getmisses;  


8、监控 SGA 中共享缓存区的命中率,应该小于1%
select sum(pins) "Total Pins", sum(reloads) "Total Reloads", sum(reloads)/sum(pins) *100 libcache from v$librarycache;     
 
select sum(pinhits-reloads)/sum(pins) "hit radio",sum(reloads)/sum(pins) "reload percent" from v$librarycache;     

9、显示所有数据库对象的类别和大小
select count(name) num_instances ,type ,sum(source_size) source_size ,sum(parsed_size) parsed_size ,sum(code_size) code_size ,sum(error_size) error_size, sum(source_size) +sum(parsed_size) +sum(code_size) +sum(error_size) size_required from dba_object_size group by type order by 2;  

10、监控 SGA 中重做日志缓存区的命中率,应该小于1%
SELECT name, gets, misses, immediate_gets, immediate_misses,Decode(gets,0,0,misses/gets*100) ratio1,Decode(immediate_gets+immediate_misses,0,0,immediate_misses/(immediate_gets+immediate_misses)*100) ratio2 FROM v$latch WHERE name IN ('redo allocation', 'redo copy'); 

11、监控内存和硬盘的排序比率,最好使它小于 .10,增加 sort_area_size
SELECT name, value FROM v$sysstat WHERE name IN ('sorts (memory)', 'sorts (disk)');

12、监控当前数据库谁在运行什么SQL语句
SELECT osuser, username, sql_text from v$session a, v$sqltext b  where a.sql_address =b.address order by address, piece; 

13、监控字典缓冲区###############有点问题#####################
SELECT (SUM(PINS - RELOADS)) / SUM(PINS) "LIB CACHE" FROM V$LIBRARYCACHE;     
SELECT (SUM(GETS - GETMISSES - USAGE - FIXED)) / SUM(GETS) "ROW CACHE" FROM V$ROWCACHE;     
SELECT SUM(PINS) "EXECUTIONS", SUM(RELOADS) "CACHE MISSES WHILE EXECUTING" FROM V$LIBRARYCACHE;      
后者除以前者,此比率小于1%,接近0%为好。     

SELECT SUM(GETS) "DICTIONARY GETS",SUM(GETMISSES) "DICTIONARY CACHE GET MISSES" FROM V$ROWCACHE    

14、找ORACLE字符集
select * from sys.props$ where name='NLS_CHARACTERSET';

15、监控 MTS 
select busy/(busy+idle) "shared servers busy" from v$dispatcher;     
 
此值大于0.5时,参数需加大     

select sum(wait)/sum(totalq) "dispatcher waits" from v$queue where type='dispatcher';     
select count(*) from v$dispatcher;     
select servers_highwater from v$mts;    ########################################这句报错,说表或者视图不存在

servers_highwater接近mts_max_servers时,参数需加大  


16、碎片程度################################这段都有问题
select tablespace_name,count(tablespace_name) from dba_free_space group by tablespace_name having count(tablespace_name)>10;     
 
alter tablespace name coalesce;     
alter table name deallocate unused;     
 
create or replace view ts_blocks_v as select tablespace_name,block_id,bytes,blocks,'free space' segment_name from dba_free_space union all select tablespace_name,block_id,bytes,blocks,segment_name from dba_extents;     
 
select * from ts_blocks_v;     
 
select tablespace_name,sum(bytes),max(bytes),count(block_id) from dba_free_space      
group by tablespace_name;     
 
查看碎片程度高的表################################这段都有问题
SELECT segment_name table_name , COUNT(*) extents FROM dba_segments WHERE owner NOT IN ('SYS', 'SYSTEM') GROUP BY segment_name  HAVING COUNT(*) = (SELECT MAX( COUNT(*) ) FROM dba_segments GROUP BY segment_name); 


17、找使用CPU多的用户session
select a.sid,spid,status,substr(a.program,1,10) prog,a.terminal,osuser,value/60/100 value from v$session a,v$process b,v$sesstat c  where c.statistic#=12 and c.sid=a.sid and a.paddr=b.addr order by value desc;

18、表、索引的存储情况检查(这个不用没要求)
select segment_name,sum(bytes),count(*) ext_quan from dba_extents where tablespace_name='&tablespace_name' and segment_type='TABLE' group by tablespace_name,segment_name;     

select segment_name,count(*) from dba_extents where segment_type='INDEX' and owner='&owner' group by segment_name;  

 


https://blog.csdn.net/konglongaa/article/details/54743253 

 

发表评论

您的电子邮箱地址不会被公开。 必填项已用*标注