Re: RMAN backups of SAP database

From: Jeffrey Beckstrom <jbeckstrom_at_gcrta.org>
Date: Mon, 24 Feb 2020 12:21:59 -0500
Message-Id: <5E5406370200000B0006C08E_at_groupwise2014.gcrta.org>

If SAP is doing begin/end backup, then it would not be using RMAN nor doing a compressed backup. Your RMAN is doing a compressed backup so that would use additional CPU resources. >>> Sandra Becker <sbecker6925_at_gmail.com> 2/24/20 12:13 PM >>> Thanks everyone for you suggestions and comments. I can tell you they are definitely using the version 7 style of backup where they "alter tablespace <tablespace_name> begin backup".

Here are the RMAN configuration and backup script they are using. I'm trying to see if they still have the rman backup log from their last attempt.

CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 4 DAYS; CONFIGURE BACKUP OPTIMIZATION ON;
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default CONFIGURE CONTROLFILE AUTOBACKUP OFF;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 3 BACKUP TYPE TO BACKUPSET; CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT "/backup_new/Backups/dgcs064/DB01/rman/full_ol_%t_s%s_s%p"; CONFIGURE MAXSETSIZE TO UNLIMITED; # default CONFIGURE ENCRYPTION FOR DATABASE OFF; # default CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default CONFIGURE COMPRESSION ALGORITHM 'MEDIUM' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE;
CONFIGURE ARCHIVELOG DELETION POLICY TO BACKED UP 1 TIMES TO DISK; CONFIGURE SNAPSHOT CONTROLFILE NAME TO
'/oracle/DB01/112_64/dbs/snapcf_DB01.f'; # default

RUN
{
set command id to 'ORCLOnlineBackupFull';

ALLOCATE CHANNEL c1 DEVICE TYPE disk;
ALLOCATE CHANNEL c2 DEVICE TYPE disk;
ALLOCATE CHANNEL c3 DEVICE TYPE disk;
ALLOCATE CHANNEL c4 DEVICE TYPE disk;

backup AS BACKUPSET full database tag ORCL_FULL format
'/backup_new/XXX_SAP_Backups/XXX/rman/XXX_%d_%T_%s_%p_FULL
' plus archivelog ;
backup tag ORCL_CONTROL current controlfile format
'/backup_new/XXX_Backups/XXX/rman/%d_%T_%s_%p_CONTROL'
;
DELETE NOPROMPT OBSOLETE;

release channel c1;
release channel c2;
release channel c3;
release channel c4;

}
Backup log:

Running: online_backup_disk.ksh on xxxxxxxxxxxxx AS: oraXXX
At: 20:00:02 on 02/15/2020

backup processes = 0
Starting RMAN...

Recovery Manager: Release 11.2.0.4.0 - Production on Sat Feb 15 20:00:02 2020

connected to target database: XXX (DBID=3807154456) connected to recovery catalog database

RMAN> RUN

2> {
3> set command id to 'ORCLOnlineBackupFull';
4> ALLOCATE CHANNEL c1 DEVICE TYPE disk;
5> ALLOCATE CHANNEL c2 DEVICE TYPE disk;
6> ALLOCATE CHANNEL c3 DEVICE TYPE disk;
7> ALLOCATE CHANNEL c4 DEVICE TYPE disk;
8> backup AS BACKUPSET full database tag ORCL_FULL format

'/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/%d_%T_%s_%p_FU LL' plus
archivelog ;
9> backup tag ORCL_CONTROL current controlfile format
'/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/%d_%T_%s_%p_CONTRO L';

10> DELETE NOPROMPT OBSOLETE;
11> release channel c1;
12> release channel c2;
13> release channel c3;
14> release channel c4;
15>
16> }
17>

executing command: SET COMMAND ID

allocated channel: c1
channel c1: SID=21 device type=DISK

allocated channel: c2
channel c2: SID=85 device type=DISK

allocated channel: c3
channel c3: SID=15 device type=DISK

allocated channel: c4
channel c4: SID=51 device type=DISK

Starting backup at 15-FEB-20
current log archived
channel c1: starting archived log backup set channel c1: specifying archived log(s) in backup set input archived log thread=1 sequence=37962 RECID=18943 STAMP=1032307471
input archived log thread=1 sequence=37963 RECID=18944 STAMP=1032327553
input archived log thread=1 sequence=37964 RECID=18945 STAMP=1032355400

channel c1: starting piece 1 at 15-FEB-20
channel c2: starting archived log backup set
channel c2: specifying archived log(s) in backup set

input archived log thread=1 sequence=37965 RECID=18946 STAMP=1032382820
input archived log thread=1 sequence=37966 RECID=18947 STAMP=1032393884
input archived log thread=1 sequence=37967 RECID=18948 STAMP=1032415345

channel c2: starting piece 1 at 15-FEB-20
channel c3: starting archived log backup set
channel c3: specifying archived log(s) in backup set

input archived log thread=1 sequence=37968 RECID=18949 STAMP=1032420919
input archived log thread=1 sequence=37969 RECID=18950 STAMP=1032426942
input archived log thread=1 sequence=37970 RECID=18951 STAMP=1032433588

channel c3: starting piece 1 at 15-FEB-20
channel c4: starting archived log backup set
channel c4: specifying archived log(s) in backup set

input archived log thread=1 sequence=37971 RECID=18952 STAMP=1032438208
input archived log thread=1 sequence=37972 RECID=18953 STAMP=1032458451
input archived log thread=1 sequence=37973 RECID=18954 STAMP=1032466012
channel c4: starting piece 1 at 15-FEB-20 channel c1: finished piece 1 at 15-FEB-20 piece
handle=/oracle/XXX/oraflash/XXX/backupset/2020_02_15/o1_mf_annnn_TAG20200215T200656_h4jmv1t3_.bkp tag=TAG20200215T 200656 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:10 channel c2: finished piece 1 at 15-FEB-20 piece
handle=/oracle/XXX/oraflash/XXX/backupset/2020_02_15/o1_mf_annnn_TAG20200215T200656_h4jmv1vz_.bkp tag=TAG20200215T 200656 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:10 channel c3: finished piece 1 at 15-FEB-20 piece
handle=/oracle/XXX/oraflash/XXX/backupset/2020_02_15/o1_mf_annnn_TAG20200215T200656_h4jmv2lp_.bkp tag=TAG20200215T 200656 comment=NONE
channel c3: backup set complete, elapsed time: 00:00:09 channel c4: finished piece 1 at 15-FEB-20 piece
handle=/oracle/XXX/oraflash/XXX/backupset/2020_02_15/o1_mf_annnn_TAG20200215T200656_h4jmv4w5_.bkp tag=TAG20200215T 200656 comment=NONE
channel c4: backup set complete, elapsed time: 00:00:07 Finished backup at 15-FEB-20

Starting backup at 15-FEB-20
channel c1: starting full datafile backup set channel c1: specifying datafile(s) in backup set input datafile file number=00008
name=/oracle/XXX/yyyyyyy5/sr3_5/sr3.data5 input datafile file number=00025
name=/oracle/XXX/yyyyyyy2/sr3700_1/sr3700.data1 input datafile file number=00034
name=/oracle/XXX/yyyyyyy4/sr3_25/sr3.data25 input datafile file number=00002
name=/oracle/XXX/yyyyyyy1/sysaux_1/sysaux.data1 input datafile file number=00003
name=/oracle/XXX/yyyyyyy1/undo_1/undo.data1 input datafile file number=00001
name=/oracle/XXX/yyyyyyy1/system_1/system.data1 input datafile file number=00037
name=/oracle/XXX/yyyyyyy1/system_2/system.data2 input datafile file number=00015
name=/oracle/XXX/yyyyyyy2/sr3_12/sr3.data12

channel c1: starting piece 1 at 15-FEB-20
channel c2: starting full datafile backup set
channel c2: specifying datafile(s) in backup set

input datafile file number=00035
name=/oracle/XXX/yyyyyyy5/sr3_26/sr3.data26 input datafile file number=00031
name=/oracle/XXX/yyyyyyy3/sr3_22/sr3.data22 input datafile file number=00029
name=/oracle/XXX/yyyyyyy2/sr3usr_1/sr3usr.data1 input datafile file number=00026
name=/oracle/XXX/yyyyyyy2/sr3700_2/sr3700.data2 input datafile file number=00030
name=/oracle/XXX/yyyyyyy2/vertex/vertex.data1 input datafile file number=00027
name=/oracle/XXX/yyyyyyy2/sr3fact_1/sr3fact.data1 input datafile file number=00028
name=/oracle/XXX/yyyyyyy2/sr3ods_1/sr3ods.data1 input datafile file number=00036
name=/oracle/XXX/yyyyyyy5/sr3_27/sr3.data27 input datafile file number=00032
name=/oracle/XXX/yyyyyyy5/sr3_23/sr3.data23 input datafile file number=00033
name=/oracle/XXX/yyyyyyy5/sr3_24/sr3.data24

channel c2: starting piece 1 at 15-FEB-20
channel c3: starting full datafile backup set
channel c3: specifying datafile(s) in backup set

input datafile file number=00013
name=/oracle/XXX/yyyyyyy5/sr3_10/sr3.data10 input datafile file number=00004
name=/oracle/XXX/yyyyyyy1/sr3_1/sr3.data1 input datafile file number=00005
name=/oracle/XXX/yyyyyyy2/sr3_2/sr3.data2 input datafile file number=00007
name=/oracle/XXX/yyyyyyy4/sr3_4/sr3.data4

channel c3: starting piece 1 at 15-FEB-20
channel c4: starting full datafile backup set
channel c4: specifying datafile(s) in backup set

input datafile file number=00018
name=/oracle/XXX/yyyyyyy5/sr3_15/sr3.data15 input datafile file number=00009
name=/oracle/XXX/yyyyyyy1/sr3_6/sr3.data6 input datafile file number=00006
name=/oracle/XXX/yyyyyyy3/sr3_3/sr3.data3 input datafile file number=00010
name=/oracle/XXX/yyyyyyy2/sr3_7/sr3.data7 channel c4: starting piece 1 at 15-FEB-20 channel c3: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200215_35698_1_FULL tag=ORCL_FULL comment=NONE channel c3: backup set complete, elapsed time: 11:02:29
channel c3: starting full datafile backup set channel c3: specifying datafile(s) in backup set input datafile file number=00023
name=/oracle/XXX/yyyyyyy5/sr3_20/sr3.data20 input datafile file number=00012
name=/oracle/XXX/yyyyyyy4/sr3_9/sr3.data9 input datafile file number=00014
name=/oracle/XXX/yyyyyyy1/sr3_11/sr3.data11 input datafile file number=00011
name=/oracle/XXX/yyyyyyy3/sr3_8/sr3.data8 channel c3: starting piece 1 at 16-FEB-20 channel c4: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200215_35699_1_FULL tag=ORCL_FULL comment=NONE channel c4: backup set complete, elapsed time: 11:08:38
channel c4: starting full datafile backup set channel c4: specifying datafile(s) in backup set input datafile file number=00017
name=/oracle/XXX/yyyyyyy4/sr3_14/sr3.data14 input datafile file number=00019
name=/oracle/XXX/yyyyyyy1/sr3_16/sr3.data16 input datafile file number=00016
name=/oracle/XXX/yyyyyyy3/sr3_13/sr3.data13 input datafile file number=00020
name=/oracle/XXX/yyyyyyy2/sr3_17/sr3.data17 channel c4: starting piece 1 at 16-FEB-20 channel c1: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200215_35696_1_FULL tag=ORCL_FULL comment=NONE channel c1: backup set complete, elapsed time: 20:00:10
channel c1: starting full datafile backup set channel c1: specifying datafile(s) in backup set input datafile file number=00022
name=/oracle/XXX/yyyyyyy4/sr3_19/sr3.data19 input datafile file number=00024
name=/oracle/XXX/yyyyyyy1/sr3_21/sr3.data21 input datafile file number=00021
name=/oracle/XXX/yyyyyyy3/sr3_18/sr3.data18 channel c1: starting piece 1 at 16-FEB-20 channel c2: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200215_35697_1_FULL tag=ORCL_FULL comment=NONE channel c2: backup set complete, elapsed time: 20:19:31
channel c2: starting full datafile backup set channel c2: specifying datafile(s) in backup set including current control file in backup set channel c2: starting piece 1 at 16-FEB-20 channel c2: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200216_35703_1_FULL tag=ORCL_FULL comment=NONE channel c2: backup set complete, elapsed time: 00:00:35
channel c2: starting full datafile backup set channel c2: specifying datafile(s) in backup set including current SPFILE in backup set
channel c2: starting piece 1 at 16-FEB-20 channel c2: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200216_35704_1_FULL tag=ORCL_FULL comment=NONE channel c2: backup set complete, elapsed time: 00:00:45
channel c3: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200216_35700_1_FULL tag=ORCL_FULL comment=NONE channel c3: backup set complete, elapsed time: 09:34:04
channel c4: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200216_35701_1_FULL tag=ORCL_FULL comment=NONE channel c4: backup set complete, elapsed time: 09:33:36
channel c1: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200216_35702_1_FULL tag=ORCL_FULL comment=NONE channel c1: backup set complete, elapsed time: 02:54:09
Finished backup at 16-FEB-20

Starting backup at 16-FEB-20
current log archived
channel c1: starting archived log backup set channel c1: specifying archived log(s) in backup set input archived log thread=1 sequence=37974 RECID=18955 STAMP=1032496773

channel c1: starting piece 1 at 16-FEB-20
channel c2: starting archived log backup set
channel c2: specifying archived log(s) in backup set

input archived log thread=1 sequence=37975 RECID=18956 STAMP=1032532861

channel c2: starting piece 1 at 16-FEB-20
channel c3: starting archived log backup set
channel c3: specifying archived log(s) in backup set

input archived log thread=1 sequence=37976 RECID=18957 STAMP=1032548784
channel c3: starting piece 1 at 16-FEB-20 channel c1: finished piece 1 at 16-FEB-20 piece
handle=/oracle/XXX/oraflash/XXX/backupset/2020_02_16/o1_mf_annnn_TAG20200216T192139_h4m5l6cj_.bkp tag=TAG20200216T 192139 comment=NONE
channel c1: backup set complete, elapsed time: 00:00:03 channel c2: finished piece 1 at 16-FEB-20 piece
handle=/oracle/XXX/oraflash/XXX/backupset/2020_02_16/o1_mf_annnn_TAG20200216T192139_h4m5l6f5_.bkp tag=TAG20200216T 192139 comment=NONE
channel c2: backup set complete, elapsed time: 00:00:03 channel c3: finished piece 1 at 16-FEB-20 piece
handle=/oracle/XXX/oraflash/XXX/backupset/2020_02_16/o1_mf_annnn_TAG20200216T192139_h4m5l7sx_.bkp tag=TAG20200216T 192139 comment=NONE
channel c3: backup set complete, elapsed time: 00:00:03 Finished backup at 16-FEB-20

Starting backup at 16-FEB-20
channel c1: starting full datafile backup set channel c1: specifying datafile(s) in backup set including current control file in backup set channel c1: starting piece 1 at 16-FEB-20 channel c1: finished piece 1 at 16-FEB-20 piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200216_35708_1_CONTROL tag=ORCL_CONTROL comment=NONE channel c1: backup set complete, elapsed time: 00:00:01
Finished backup at 16-FEB-20

RMAN retention policy will be applied to the command RMAN retention policy is set to recovery window of 4 days Deleting the following obsolete backups and copies: Type Key Completion Time Filename/Handle

-------------------- ------ ------------------ --------------------

Control File Copy 24619 22-FEB-18
/oracle/XXX/YYYreorg/sexwtcxc/cntrlXXX.old Control File Copy 24620 22-FEB-18
/oracle/XXX/YYYreorg/sexwtcxc/cntrlXXX.new Control File Copy 24621 22-FEB-18
/oracle/XXX/YYYreorg/sexwtnsl/cntrlXXX.old Control File Copy 24622 22-FEB-18
/oracle/XXX/YYYreorg/sexwtnsl/cntrlXXX.new Control File Copy 24623 22-FEB-18
/oracle/XXX/YYYreorg/sexwtthh/cntrlXXX.old Control File Copy 24624 22-FEB-18
/oracle/XXX/YYYreorg/sexwtthh/cntrlXXX.new Control File Copy 24625 22-FEB-18
/oracle/XXX/YYYreorg/sexwttjx/cntrlXXX.old Control File Copy 24626 22-FEB-18
/oracle/XXX/YYYreorg/sexwttjx/cntrlXXX.new Control File Copy 24627 22-FEB-18
/oracle/XXX/YYYreorg/sexwuasu/cntrlXXX.old Control File Copy 24628 22-FEB-18
/oracle/XXX/YYYreorg/sexwuasu/cntrlXXX.new Control File Copy 24629 23-FEB-18
/oracle/XXX/YYYreorg/sexwuqtu/cntrlXXX.old Control File Copy 24630 23-FEB-18
/oracle/XXX/YYYreorg/sexwuqtu/cntrlXXX.new Control File Copy 24631 08-MAR-18
/oracle/XXX/YYYreorg/sexzjthw/cntrlXXX.old Control File Copy 24632 08-MAR-18
/oracle/XXX/YYYreorg/sexzjthw/cntrlXXX.new

Control File Copy 24633 11-MAY-18 /tmp/control01.ctl
Control File Copy 24634 14-MAY-18 /oracle/XXX/112_64/dbs/snapcf_XXX.f
Control File Copy 24635 22-APR-19

/oracle/XXX/YYYreorg/sfaywtzs/cntrlXXX.old Control File Copy 24636 22-APR-19
/oracle/XXX/YYYreorg/sfaywtzs/cntrlXXX.new Control File Copy 24637 22-APR-19
/oracle/XXX/YYYreorg/sfaywukz/cntrlXXX.old Control File Copy 24638 22-APR-19
/oracle/XXX/YYYreorg/sfaywukz/cntrlXXX.new Control File Copy 24639 26-SEP-19 /oracle/XXX/YYYbackup/cntrlXXX.dbf Backup Set 3276340 02-FEB-20
Backup Piece 3276351 02-FEB-20
/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200202_35669_1_FULL deleted backup piece
backup piece
handle=/backup_new/YYY_Backups/xxxxxxxxxxxxx/XXX/rman/XXX_20200202_35669_1_FULL RECID=23483 STAMP=103132361 4
Deleted 1 objects

RMAN-06207: WARNING: 21 objects could not be deleted for DISK channel(s) due

RMAN-06208: to mismatched status. Use CROSSCHECK command to fix status
RMAN-06210: List of Mismatched objects
RMAN-06211: ==========================
RMAN-06212: Object Type Filename/Handle
RMAN-06213: ---------------
---------------------------------------------------
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwtcxc/cntrlXXX.old
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwtcxc/cntrlXXX.new
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwtnsl/cntrlXXX.old
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwtnsl/cntrlXXX.new
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwtthh/cntrlXXX.old
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwtthh/cntrlXXX.new
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwttjx/cntrlXXX.old
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwttjx/cntrlXXX.new
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwuasu/cntrlXXX.old
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwuasu/cntrlXXX.new
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwuqtu/cntrlXXX.old
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexwuqtu/cntrlXXX.new
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexzjthw/cntrlXXX.old
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sexzjthw/cntrlXXX.new
RMAN-06214: Datafile Copy /tmp/control01.ctl
RMAN-06214: Datafile Copy /oracle/XXX/112_64/dbs/snapcf_XXX.f
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sfaywtzs/cntrlXXX.old
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sfaywtzs/cntrlXXX.new
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sfaywukz/cntrlXXX.old
RMAN-06214: Datafile Copy /oracle/XXX/YYYreorg/sfaywukz/cntrlXXX.new
RMAN-06214: Datafile Copy /oracle/XXX/YYYbackup/cntrlXXX.dbf

released channel: c1

released channel: c2

released channel: c3

released channel: c4

Recovery Manager complete.

On Sun, Feb 23, 2020 at 9:15 PM Mladen Gogala <gogala.mladen_at_gmail.com> wrote:

BR*Tools do leave a log file and have several methods. One of them is UTL_FILE, the other one is RMAN. UTL_FILE is basially, version 7 style backup of files with the database in the backup mode. Another brbackup method is RMAN, with some twists. BR*Tools can't utilize catalog. I wander what method is used by BR*Tools. BR*Tools, as opposed to RMAN, can also utilize snapshots. The phrase "SAP backup" doesn't mean much without the exact configuration of brbackup. BR*backup is also backing up the SAP configuration files, which are ignored by usual RMAN backups. SAP only certifies BR*Tools for SAP R3 backup. RMAN backup is not certified. There are many nuances here, and discussing BR*Tools without knowing the details is pointless.
On 2/23/20 9:23 PM, Jack van Zanen wrote:

First question: Can they prove it is your backup causing the Performance issue. You may be on a wild goose chase

Even SAP backups most likely leave a log file behind somewhere that should tell you what the SAP backup is doing (is it actually making a backup?) . Don't they use RMAN under the hood anyway?

Regards

Jack van Zanen

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On Sat, Feb 22, 2020 at 6:22 AM Sandra Becker <sbecker6925_at_gmail.com> wrote:

Oracle EE v11.2

The Basis admin from another team has asked if I can help him find out why RMAN backups of his SAP database cause severe performance issues in the database with only two channels. Yet the SAP backup method runs with 6 parallel processes in about 4-5 hours. I know nothing about how the SAP backups are configured and don't have access to any of that information, so I'm not sure you'll be able to provide much help to us. I do know the following:

	●  they don't use ASM
	●  all files are on the same NFS mount, including the
datafiles, binaries, logs, audit files, etc.
	●  archivelogs are kept for 3 days and written to another NFS
mounted drive
	●  SAP backup method uses 6 channels, backup completes in 4-5
hours
	●  RMAN backup was set for 2 channels, backup tool over 12

hours and caused significant performance degradation (so I was told, I can't prove it)
Any suggestions on what they should look at to see what's going on or adjustments they should look into? I've looked at their RMAN configuration and it's actually pretty close to what I use in my production databases, just minor differences for path names and the like.

-- 
Sandy B.

 
 -- Mladen GogalaDatabase ConsultantTel: (347) 321-1217 


-- 
Sandy B.



--
http://www.freelists.org/webpage/oracle-l

Received on Mon Feb 24 2020 - 18:21:59 CET

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