请问如何查找个人信息(如何查寻个人信息)
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2022-05-28
1 操作系统错误记录
errpt
/var/log/messages
2 网卡状态
ifconfig
3 操作系统总体状态
top
topas
cpu user%
disk busy%
network Kbps
memory %comp
max cpu pro
4 操作系统性能
top
topas
1.运行时间及1、5、15分钟CPU的负载情况
2.进程统计
3.CPU统计
4.内存
5.交换分区
6.具体进程,按%CPU排序
检测CPU情况,1,5,15分钟的负载
uptime
检测内存状况
free -m
检测硬盘状况
df -h
通过vmstat命令检测系统
vmstat 5 5
-- r: The number of processes waiting for run time展示了正在执行和等待CPU资源的任务个数。当这个值超过了CPU数目,就会出现CPU瓶颈了
-- wa的值高时,说明IO等待比较严重,这可能是由于磁盘大量作随机访问造成,也有可能是磁盘的带宽出现瓶颈(块操作)。
iostat
5 文件系统磁盘空间
df -g
6 集群运行状态
su - oracle
olsndoes
crsctl query css votedisk
ocrcheck
crsctl check crs
crs_stat -t
lsnrctl status
7 检测Oracle死锁
cat alert_orcl.log | grep ORA-00600
select count(*) from v$session where lockwait is not null;
8 Oracle实例状态
select instance_name, version, status, database_status fromv$instance;
9 Oracle数据库状态
select name, log_mode, open_mode, flashback_on fromv$database;
10 检查数据库进程
ps -ef | grep ora_ | grep -v grep | wc -l
show parameter processes
11 检查数据库的会话数
一个稳定运行的数据库里,会话数量应保持平稳,如果出现会话数量大幅增加或大幅减少,就意味着可能出现了问题,需要进一步查找原因。(需要与日常稳定数值对比)
select count(*) from v$session;
show parameter sessions;
select sid,serial#,username,program,machine,status fromv$session;
#alter system kill session 'SID,SERIAL#';
12 检查控制文件
select * from v$controlfile;
13 检查日志文件
select * from v$logfile;
14 检查表空间
select tablespace_name,contents,status from dba_tablespaces;
检查Oracle表空间使用情况
SELECT d.status "Status",
d.tablespace_name "Name",
d.contents"Type",
d.extent_management "Extent Management",
TO_CHAR(NVL(a.bytes / 1024 / 1024, 0), '99,999,990.900') "Size(M)",
TO_CHAR(NVL(a.bytes - NVL(f.bytes, 0), 0) / 1024 / 1024, '99999999.999')|| '/' ||
TO_CHAR(NVL(a.bytes / 1024 / 1024, 0), '99999999.999') "Used (M)",
TO_CHAR(NVL((a.bytes - NVL(f.bytes, 0)) / a.bytes * 100, 0), '990.00')"Used %"
FROMsys.dba_tablespaces d,
(selecttablespace_name, sum(bytes) bytes
fromdba_data_files
group bytablespace_name) a,
(select tablespace_name,sum(bytes) bytes
fromdba_free_space
group bytablespace_name) f
WHEREd.tablespace_name = a.tablespace_name(+)
ANDd.tablespace_name = f.tablespace_name(+)
AND NOT(d.extent_management like 'LOCAL' AND d.contents like 'TEMPORARY')
UNION ALL
SELECT d.status "Status",
d.tablespace_name "Name",
d.contents"Type",
d.extent_management "Extent Management",
TO_CHAR(NVL(a.bytes / 1024 / 1024, 0), '99,999,990.900') "Size(M)",
TO_CHAR(NVL(t.bytes,0) / 1024 / 1024, '99999999.999') || '/' ||
TO_CHAR(NVL(a.bytes / 1024 / 1024, 0), '99999999.999') "Used(M)",
TO_CHAR(NVL(t.bytes / a.bytes * 100, 0), '990.00') "Used %"
FROMsys.dba_tablespaces d,
(selecttablespace_name, sum(bytes) bytes
fromdba_temp_files
group bytablespace_name) a,
(selecttablespace_name, sum(bytes_cached) bytes
fromv$temp_extent_pool
group bytablespace_name) t
WHEREd.tablespace_name = a.tablespace_name(+)
ANDd.tablespace_name = t.tablespace_name(+)
ANDd.extent_management like 'LOCAL'
AND d.contents like'TEMPORARY'
/
确保表空间剩余空间维持在20%以上
15 检查数据文件
select name, status from v$datafile;
检查数据文件的autoextensible
select tablespace_name, file_id, ONLINE_STATUS,autoextensible from dba_data_files union all select tablespace_name, file_id,status, autoextensible from dba_temp_files;
SQL> select tablespace_name, file_id, ONLINE_STATUS,autoextensible from dba_data_files union all select tablespace_name, file_id,status, autoextensible from dba_temp_files;
16 检查回滚段
select segment_name, status from dba_rollback_segs;
查看回滚段是否自动管理
show parameter uodo_management
17 检查数据库的无效对象
col object_name for a20
col owner for a15
select owner, object_name, object_type, status fromdba_objects where status != 'VALID' and owner != 'SYS' and owner != 'SYSTEM';
SQL> col object_name for a20
SQL> col owner for a15
SQL> select owner, object_name, object_type, status fromdba_objects where status != 'VALID' and owner != 'SYS' and owner != 'SYSTEM';
18 检查系统资源限制
select * from v$resource_limit;
19 检查Oracle扩展异常对象
select segment_name, segment_type, tablespace_name,(extents/max_extents)*100 percent from dba_segments where max_extents !=0 and(extents/max_extents)*100 >=90 order by percent;
SQL> select segment_name, segment_type, tablespace_name,(extents/max_extents)*100 percent from dba_segments where max_extents !=0 and(extents/max_extents)*100 >=90 order by percent;
20 检查Oracle系统表空间
select distinct(owner) from dba_tables where tablespace_name= 'SYSTEM' and owner != 'SYS' and owner != 'SYSTEM'
union all
select distinct(owner) from dba_indexes wheretablespace_name = 'SYSTEM' and owner != 'SYS' and owner != 'SYSTEM';
oracle系统表空间一般是用于存放sys和system用户数据的,通常其它用户的数据是不能存放在系统表空间中,通过检查这项内容,可以发现有哪些非sys和system用户的数据被存放在系统表空间里,以防止其存储空间被过度占用而引起数据库问题。(此类用户属于内部用户,状态正常)
21 无效索引
select index_name,index_type,tablespace_name,status fromuser_indexes;
select index_name,index_type,tablespace_name,status fromdba_indexes where status!='VALID';
select index_name,index_type,tablespace_name,status fromdba_indexes where status='INVALID' or status='UNUSEABLE';
22 RMAN备份情况(全备或者增量备份)
list backup;
list backup of controlfile;
list backup of database;
list backup of archivelog all;
23 逻辑备份情况(EXPDP或EXP)
24 生成statspack与AWR报告,对数据库进行具体性能分析
ARW报告存放目录
警告日志存放目录
tree老师推荐
Oracle 数据库
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