General Queries

                                                                      



     

Tablespace growth Size

We can use view to check tablespace size greater than 80%

RAC / NON-RAC / Cloud RDS:

SELECT tbm.TABLESPACE_NAME,   round(tbm.USED_SPACE * tb.BLOCK_SIZE /(1024*1024*1024),2) as USED_SPACE_GB,   round(tbm.TABLESPACE_SIZE * tb.BLOCK_SIZE /(1024*1024*1024),2) as TBS_SIZE_GB,   round((tbm.TABLESPACE_SIZE - tbm.USED_SPACE) * tb.BLOCK_SIZE /(1024*1024*1024),2) as TBS_FREE_SIZE_GB,   round(tbm.USED_PERCENT) as PERCENT_USEDFROM dba_tablespace_usage_metrics tbm      join dba_tablespaces tb on tb.TABLESPACE_NAME = tbm.TABLESPACE_NAME where round(tbm.USED_PERCENT) > 80;";

SQL monitoring

We can use to check current executing SQL's.

RAC / Cloud RDS:

select inst_id,status,round(elapsed_time/1000000,2) as duration_secs,sql_id,sql_plan_hash_value,username,

px_maxdop as degree_of_parallelism, px_maxdop_instances as instances_used,

px_is_cross_instance as cross_instance,user_io_wait_time,cluster_wait_time,

concurrency_wait_time,round(cpu_time/1000000,2),queuing_time,PHYSICAL_READ_REQUESTS,

PHYSICAL_READ_BYTES,PHYSICAL_WRITE_REQUESTS,PHYSICAL_WRITE_BYTES,

to_char(SQL_EXEC_START,'HH24:MI:SS'),to_char(LAST_REFRESH_TIME,'HH24:MI:SS'),sql_text from gv$sql_monitor where status='EXECUTING';


NON-RAC / Cloud RDS:

select inst_id,status,round(elapsed_time/1000000,2) as duration_secs,sql_id,sql_plan_hash_value,username,

px_maxdop as degree_of_parallelism, px_maxdop_instances as instances_used,

px_is_cross_instance as cross_instance,user_io_wait_time,cluster_wait_time,

concurrency_wait_time,round(cpu_time/1000000,2),queuing_time,PHYSICAL_READ_REQUESTS,

PHYSICAL_READ_BYTES,PHYSICAL_WRITE_REQUESTS,PHYSICAL_WRITE_BYTES,

to_char(SQL_EXEC_START,'HH24:MI:SS'),to_char(LAST_REFRESH_TIME,'HH24:MI:SS'),sql_text from gv$sql_monitor where status='EXECUTING';


 SQL_ID from sqltext


select sql_id,sql_text from  DBA_HIST_SQLTEXT where sql_text like '<query partial string>';


Datapump Jobs

We can use view to check running Datapump jobs.

RAC / NON-RAC / Cloud RDS:

select owner_name,job_name,operation,job_mode,state,degree,attached_sessions, datapump_sessions from dba_datapump_jobs where state like '%RUNNING%';


DB Scheduler Jobs Status

We can user view to check DB Scheduler Failed Jobs details.

RAC / NON-RAC / Cloud RDS:

select log_id, owner,job_name, status,run_duration, additional_info,log_date         from  dba_scheduler_job_run_details where status != 'SUCCEEDED' and log_date >= sysdate-1;


Standby Lag Status

We can use view to check Standby Lag delay.

RAC / NON-RAC / Cloud RDS:

SELECT SUM(DECODE(name, 'apply finish time', value, 0)) as Apply_Time, SUM(DECODE(name, 'apply lag', value, 0)) as Apply_LAG, SUM(DECODE(name, 'transport lag', value, 0)) as Transport_LAG from (SELECT name, extract(day from p.val) *86400 + extract(hour from p.val) *3600 + extract(minute from p.val) *60 + extract(second from p.val) value from (SELECT name,to_dsinterval(value) val from v$dataguard_stats) p );


RMAN Backup Status

We can use view to check rman backup status.

RAC / NON-RAC / Cloud RDS:

select to_char(start_time,'dd-mm-yyyy hh24:mi:ss') as start_time, to_char(end_time,'dd-mm-yyyy_hh24:mi:ss') as end_time, status, round(mbytes_processed/1024, 2) as GB_processed,object_type,operation,row_type,sid from v$rman_status where start_time >= sysdate-1  order by start_time desc;


Blocking Sessions

We can use view to identify blocking sessions. Below query checking blocking sessions > 60 seconds.

RAC / Cloud RDS:

SELECT   inst_id, blocking_session,    sid,   serial#,    seconds_in_wait FROM   gv$session WHERE    blocking_session IS NOT NULL and seconds_in_wait > 60 ;

NON-RAC / Cloud RDS:

SELECT   blocking_session,    sid,   serial#,    seconds_in_wait FROM   v$session WHERE    blocking_session IS NOT NULL and seconds_in_wait > 60 ;


Long Running Queries

We can use view to check long running queries.

RAC / Cloud RDS:

SELECT distinct sl.SID, sl.SERIAL#,s.sql_id, sl.opname, sl.SOFAR, sl.TOTALWORK,sl.target,ROUND(sl.SOFAR/sl.TOTALWORK*100,2) COMPLETE,sq.sql_text
FROM   gV$SESSION_LONGOPS sl, gv$session s, gv$sql sq
WHERE sl.sid=s.sid and s.sql_id=sq.sql_id and
TOTALWORK != 0
AND    SOFAR != TOTALWORK
order by 1;

NON-RAC / Cloud RDS:

SELECT distinct sl.SID, sl.SERIAL#,s.sql_id, sl.opname, sl.SOFAR, sl.TOTALWORK,sl.target,ROUND(sl.SOFAR/sl.TOTALWORK*100,2) COMPLETE,sq.sql_text
FROM   V$SESSION_LONGOPS sl, v$session s, v$sql sq
WHERE sl.sid=s.sid and s.sql_id=sq.sql_id and
TOTALWORK != 0
AND    SOFAR != TOTALWORK
order by 1;

Long Running Sessions

We can use view to check long running sessions.

RAC / Cloud RDS: sessions running more than 15 minutes.

select * from (select inst_id,sid,serial#,username,trunc(last_call_et/3600,2)||' hr' as last_call_et,sql_id,status,machine,osuser,logon_time from gv$session where last_call_et > 900 and username not like '%SYS%' and sql_id is not null) ;


NON-RAC / Cloud RDS: sessions running more than 15 minutes.


select * from (select sid,serial#,username,trunc(last_call_et/3600,2)||' hr' as last_call_et,sql_id,status,machine,osuser,logon_time from v$session where last_call_et > 900 and username not like '%SYS%' and sql_id is not null) ;


Locked Tables

We can use view to check locks on Tables.

RAC / Cloud RDS: Tables locked more than 5 minutes

SELECT s.inst_id,d.OBJECT_ID, object_name, l.SESSION_ID,s.last_call_et, l.ORACLE_USERNAME, l.LOCKED_MODE from   gv$locked_object l, dba_objects d, gv$session s where  d.OBJECT_ID=l.OBJECT_ID and s.sid=l.SESSION_ID and s.last_call_et > 300 ;


NON-RAC / Cloud RDS: Tables locked more than 5 minutes

SELECT d.OBJECT_ID, object_name, l.SESSION_ID,s.last_call_et, l.ORACLE_USERNAME, l.LOCKED_MODE from   v$locked_object l, dba_objects d, v$session s where  d.OBJECT_ID=l.OBJECT_ID and s.sid=l.SESSION_ID and s.last_call_et > 300 ;


Live Transactions

We can use view to check current running transactions.

RAC / Cloud RDS: transactions running more than 5 minutes.

SELECT s.inst_id,l.ORACLE_USERNAME,object_name, l.SESSION_ID,s.last_call_et,  l.LOCKED_MODE,t.xidusn, t.used_urec, t.used_ublk,s.saddr, t.ses_addr from   gv$locked_object l, dba_objects d, gv$session s, gv$transaction t where  d.OBJECT_ID=l.OBJECT_ID and s.sid=l.SESSION_ID and s.last_call_et > 300 and s.saddr = t.ses_addr;


NON-RAC / Cloud RDS: transactions running more than 5 minutes.

SELECT l.ORACLE_USERNAME,object_name, l.SESSION_ID,s.last_call_et,  l.LOCKED_MODE,t.xidusn, t.used_urec, t.used_ublk,s.saddr, t.ses_addr from   v$locked_object l, dba_objects d, v$session s, v$transaction t where  d.OBJECT_ID=l.OBJECT_ID and s.sid=l.SESSION_ID and s.last_call_et > 300 and s.saddr = t.ses_addr;


Temp Usage

We can use view to check temp usage percentage.

RAC / Cloud RDS:

select inst_id, tablespace_name, total_blocks, used_blocks, free_blocks from gv$sort_segment where free_blocks <=0;


NON-RAC / Cloud RDS:

select inst_id, tablespace_name, total_blocks, used_blocks, free_blocks from v$sort_segment where free_blocks <=0;


CPU Sessions usage

we can use view to get each session cpu usage.

RAC / Cloud RDS: Top 10 sessions from last 1 hour cpu usage

select * from (select * from

(

select username,sid,

       round((cpu_usage/(

                        select sum(value) total_cpu_usage

                          from gv$sesstat t

                         inner join gv$session  s on ( t.sid = s.sid )

                         inner join gv$statname n on ( t.statistic# = n.statistic# )

                         where n.name like '%CPU used by this session%'

                           and nvl(s.sql_exec_start, s.prev_exec_start) >= sysdate-1/24

                        ))*100/16,2) cpu_usage_per_cent,

       module_info,client_info,sql_id

  from

(

select nvl(s.username,'Oracle Internal Proc.') username,s.sid,s.sql_id,t.value cpu_usage, nvl(s.module, s.program) module_info, decode(s.osuser,'oracle', s.client_info, s.osuser) client_info

  from gv$sesstat t

       inner join gv$session  s on ( t.sid = s.sid )

       inner join gv$statname n on ( t.statistic# = n.statistic# )

where n.name like '%CPU used by this session%'

   and nvl(s.sql_exec_start, s.prev_exec_start) >= sysdate-1/24

) s1

)

order by cpu_usage_per_cent desc) where rownum < 10;

NON-RAC / Cloud RDS: Top 10 sessions from last 1 hour cpu usage

select * from (select * from

(

select username,sid,

       round((cpu_usage/(

                        select sum(value) total_cpu_usage

                          from v$sesstat t

                         inner join v$session  s on ( t.sid = s.sid )

                         inner join v$statname n on ( t.statistic# = n.statistic# )

                         where n.name like '%CPU used by this session%'

                           and nvl(s.sql_exec_start, s.prev_exec_start) >= sysdate-1/24

                        ))*100/16,2) cpu_usage_per_cent,

       module_info,client_info,sql_id

  from

(

select nvl(s.username,'Oracle Internal Proc.') username,s.sid,s.sql_id,t.value cpu_usage, nvl(s.module, s.program) module_info, decode(s.osuser,'oracle', s.client_info, s.osuser) client_info

  from v$sesstat t

       inner join v$session  s on ( t.sid = s.sid )

       inner join v$statname n on ( t.statistic# = n.statistic# )

where n.name like '%CPU used by this session%'

   and nvl(s.sql_exec_start, s.prev_exec_start) >= sysdate-1/24

) s1

)

order by cpu_usage_per_cent desc) where rownum < 10;


Alert Log view

We can use view to read errors/warnings in alert log file.

RAC / Cloud RDS:

SELECT inst_id, originating_timestamp, message_text
FROM TABLE (
gv$ (
CURSOR (
SELECT inst_id, originating_timestamp, message_text
FROM v$diag_alert_ext
WHERE     originating_timestamp > (sysdate- 1)
AND message_text like '%ORA-%')))
ORDER BY inst_id, originating_timestamp;

NON-RAC / Cloud RDS:

select inst_id,to_char(originating_timestamp) as originating_timestamp,message_text,host_address,to_char(normalized_timestamp) as normalized_timestamp from  v$diag_alert_ext where message_text like '%ORA-%' and originating_timestamp > sysdate-1/24 order by originating_timestamp desc;


LOB segment size

We can use below steps to claim space from LOB segments.

Get list of LOBs:

select owner,segment_name,segment_type,bytes/1024/1024/1024 as "Size_GB" from dba_segments where segment_name='<table_name>' and owner='<table_owner>';

Get List LOB Columns:

select owner,table_name,column_name from dba_lobs where owner='<owner_name>' and segment_name='<lob_segment_name>';

LOBs Size:

select sum(dbms_lob.getlength(<lob_column_name>)) from <table_owner>.<table_name>;


Invalid Objects

We can use view to get invalid objects list;

RAC / NON-RAC / Cloud RDS:

select owner,object_name,object_type,status from dba_objects where status='INVALID';

Index Invalid Status

We can use view to check Index Invalid list.

RAC / NON-RAC / Cloud RDS:

select OWNER,TABLE_OWNER,TABLE_NAME,INDEX_NAME,status,ini_trans from dba_indexes where status='INVALID' ;


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