Happy Birthday With A Cake
March 7th, 2026, posted in DAtEs iN a YeARRMAN-06059: Expected Archived Log Not Found, Loss Of Archived Log Compromises Recoverability
February 22nd, 2026, posted in Oracle QueriesError :
RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE PLUS ARCHIVELOG;
Starting backup at 18-NOV-21
current log archived
using channel ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup plus archivelog command at 11/18/2021 17:29:50
RMAN-06059: expected archived log not found, loss of archived log compromises recoverability
ORA-19625: error identifying file /u02/immam/db/apps_st/data/archive/1_500_1195296918.dbf
ORA-27037: unable to obtain file status
SVR4 Error: 2: No such file or directory
Additional information: 3
Solution :
Once in a while, there will be an archive log that is expired but not deleted.
If that is the case, there is an easy answer :
RMAN> crosscheck archivelog all;
RMAN> list expired archivelog all;
RMAN> delete expired archivelog all;Now, run the backup again.. It will work !!
ORACLE ERROR:ORA-28000: the account is locked
February 9th, 2026, posted in Oracle QueriesFor Oracle Database Configure Swap Area
January 25th, 2026, posted in Oracle, Oracle EBS ApplicationFor Oracle Database Configure Swap Area according to formula
According to the Installation manual and Note 169706.1. The swap space needs
to be configured as follows :
If RAM = 1024MB to 2048Mb
then 1.5 times RAM
elseif RAM > 2048MB and 8192MB
then .75 times RAMFollowing example show all the three cases :
- 1. IF RMAM is 2GB then it lies in 1st condition as per formula then swap area should be 2*1.5= 3 GB
- 2. If RAM is 4 GB then it lies in 2nd condition as per formula then swap area should be 4 *1 = 4 GB.
- 3. IF RMAN is 10 GB then it lies in 3rd condition as per formula then swap are should be 10*0.75=7.5 GB
Check The Size Of Tablespaces of Oracle Database In Percentage With Suggestion
January 5th, 2026, posted in Oracle QueriesTo see how full tablespaces are in an Oracle database, you might need to add a datafile.
If the used size of a tablespace is more than 80% of its maximum size, consider adding a datafile. The script recommends adding a datafile when the tablespace is 80% full.
Query return the result as :
Query to suggest which datafiles to add if they are 75% full.
Explain the following query columns :
| Name | Name of Tablespace |
| Maxsize(GB) | If autoextensible of datafile is on then it will pick sum of maxsize otherwise sum of bytes column. |
| Used(GB) | sum of bytes column of all datafiles |
| Free(GB) | space free in datafiles |
| USED% | check with used(GB) and free(GB) column — no n |
| Suggestion | Give suggesion on tablespace which space is utilized above 80% |
Script to check tablespace usage and suggest adding files to the database.
set colsep |
set linesize 200 pages 100 trimspool on numwidth 14
col name format a15
col owner format a15
col "Used(GB)" format a10
col "Free(GB)" format a10
col "(Used)%" format a10
col "Size(GB)" format a10
col "MaxSize(GB)" format a11
col "(Used)%" format a10
col Suggestion format a26
select Name,"MaxSize(GB)","Size(GB)","Used(GB)","Free(GB)","(Used)%",
Case when AcctoMaxSizeUsed >= 80 then 'NeedtoAddDatafile' else '' end as Suggestion
from
(
SELECT d.status "Status", d.tablespace_name as Name,
TO_CHAR(NVL(a.maxbytes / 1024 / 1024 /1024, 0),'999999.90') "MaxSize(GB)",
TO_CHAR(NVL(a.bytes / 1024 / 1024 /1024, 0),'999999.90') "Size(GB)",
TO_CHAR(NVL(a.bytes - NVL(f.bytes, 0), 0)/1024/1024 /1024,'999999.90') "Used(GB)",
TO_CHAR(NVL(f.bytes / 1024 / 1024 /1024, 0),'999999.90') "Free(GB)",
TO_CHAR(NVL((a.bytes - NVL(f.bytes, 0)) / a.bytes * 100, 0), '990.00') "(Used)%",
TO_CHAR(NVL( (NVL(a.bytes, 0)) / a.maxbytes * 100, 0), '990.00') as AcctoMaxSizeUsed
FROM sys.dba_tablespaces d,
(select tablespace_name, sum(bytes) bytes, SUM( CASE WHEN autoextensible = 'YES' THEN maxbytes ELSE bytes END ) as maxbytes from dba_data_files group by tablespace_name) a,
(select tablespace_name, sum(bytes) bytes from dba_free_space group by tablespace_name) f WHERE
d.tablespace_name = a.tablespace_name(+) AND d.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 as Name,
TO_CHAR(NVL(a.maxbytes / 1024 / 1024 /1024, 0),'999999.90') "MaxSize(GB)",
TO_CHAR(NVL(a.bytes / 1024 / 1024 /1024, 0),'999999.90') "Size(GB)",
TO_CHAR(NVL(t.bytes,0)/1024/1024 /1024,'999999.90') "Used(GB)",
TO_CHAR(NVL((a.bytes -NVL(t.bytes, 0)) / 1024 / 1024 /1024, 0),'999999.90') "Free(GB)",
TO_CHAR(NVL(t.bytes / a.bytes * 100, 0), '990.00') "(Used)%" ,
TO_CHAR(NVL( NVL(a.bytes, 0) / a.maxbytes * 100, 0), '990.00') as AcctoMaxSizeUsed
FROM sys.dba_tablespaces d,
(select tablespace_name, sum(bytes) bytes,SUM( CASE WHEN autoextensible = 'YES' THEN maxbytes ELSE bytes END ) as maxbytes from dba_temp_files group by tablespace_name) a,
(select tablespace_name, sum(bytes_cached) bytes from v$temp_extent_pool group by tablespace_name) t
WHERE d.tablespace_name = a.tablespace_name(+) AND d.tablespace_name = t.tablespace_name(+) AND
d.extent_management like 'LOCAL' AND d.contents like 'TEMPORARY'
) k order by suggestionAfter getting the recommendation of adding datafile in tablespace.
Check the datafiles present in the tablespace :
select file_name from dba_Data_Files where tablespace_name = 'TEST';Or
set line 999 pages 999 col FILE_NAME format a50 col tablespace_name format a15 Select tablespace_name, file_name, autoextensible, bytes/1024/1024/1024 "USEDSPACE GB", maxbytes/1024/1024/1024 "MAXSIZE GB" from dba_data_filesIf you need to add datafiles, use the following commands:
alter tablespace USERS add datafile 'D:\ORACLE11204\ORADATA\PEGA\USERS02.DBF' size 1G autoextend on next 500M maxsize 16G;