SQL server Blocking sessions

 SQL server queries

To check blocking sessions

Dbcc OpenTran will give only newest blocking session not all blocking sessions .

For all blocking sessions below query will give you

SELECT

    [s_tst].[session_id],

    [s_es].[login_name] AS [Login Name],

    DB_NAME (s_tdt.database_id) AS [Database],

    [s_tdt].[database_transaction_begin_time] AS [Begin Time],

    [s_tdt].[database_transaction_log_bytes_used] AS [Log Bytes],

    [s_tdt].[database_transaction_log_bytes_reserved] AS [Log Rsvd],

    [s_est].text AS [Last T-SQL Text],

    [s_eqp].[query_plan] AS [Last Plan]

FROM

    sys.dm_tran_database_transactions [s_tdt]

JOIN

    sys.dm_tran_session_transactions [s_tst]

ON

    [s_tst].[transaction_id] = [s_tdt].[transaction_id]

JOIN

    sys.[dm_exec_sessions] [s_es]

ON

    [s_es].[session_id] = [s_tst].[session_id]

JOIN

    sys.dm_exec_connections [s_ec]

ON

    [s_ec].[session_id] = [s_tst].[session_id]

LEFT OUTER JOIN

    sys.dm_exec_requests [s_er]

ON

    [s_er].[session_id] = [s_tst].[session_id]

CROSS APPLY

    sys.dm_exec_sql_text ([s_ec].[most_recent_sql_handle]) AS [s_est]

OUTER APPLY

    sys.dm_exec_query_plan ([s_er].[plan_handle]) AS [s_eqp]

ORDER BY

    [Begin Time] ASC;

GO

https://oss.menaitechsystems.com/SejelTech/application/hrms/mename/index.php

DBCA silent database creation.

Why we need silent feature of Database creation using DBCA?

1. To achieve database creation on non graphical environment.
2. This point is my environment : As you know SAP installation on Windows not support Oracle RAC on Windows ( those who work on SAP project they well known this matter). To achieve first we need to install SAP using single instance and migrate database from single to RAC.

And another main issue is SAP only support UTF-8 database characterset that you don't find in DBCA graphical database creation mode.

Below is the Command to achive silent database creation in non graphical environment:

dbca -silent -createDatabase -templateName General_Purpose.dbc -gdbName PIB -sid PIB -sysPassword password123 -systemPassword password123 -sysmanPassword password123 -dbsnmpPassword password123 -emConfiguration NONE -storageType ASM -diskGroupName PIBDATA -datafile Destination PIBDATA,ARCH -datafileJarLocation D:\app\PIB\11.2.0.4\assistants\dbca\templates -nodeinfo proudsapdb01,proudsapdb02 -characterset UTF8 -nationalCharacterSet UTF8 -obfuscatedPasswords false -sampleSchema false -asmSysPassword password123 -totalMemory 20480 -redoLogFileSize 250

Powerful Command !!!

shutdown -i

This windows command is use to shutdown or restart Remote Desktop Server or Machine from your local laptop or Windows Desktop.

In my scenario this help's me to restart Windows server as I connected to a server using Remote Desktop when it hang's and I'm not in Data Centre to restart physically on the server using power on off or restart button.

When you type shutdown -i from cmd it'll open new window in that you'll find 2 main tabs 1. hostname or Ip of the server 2. Shutdown, Startup, Restart. Hope this will help you it might be a single shutdown -i. I believe sharing knowledge is getting knowledge more than helping.

Important Point is You should have Administrator Privilege to execute this command.

Why Resetlogs The Database When You Restore Old Or Restore From Autobackup Or Recreated Controlfile In Oracle?

Question: After creating a controlfile manually without any backup how the database goes to a consistent state? Because the newly created controlfile does not have the scn details as well as checkpoint information that the deleted controlfile had.
Also after restoring the controlfile is it needed to open the database in resetlogs mode? If not why?

Good question

I too was very focusing on this one when I restore controlfile and open the database with resetlogs and I try to open with noresetlogs but no luck.

With this point I clear my doubt and according to my understanding if you recreated controlfile or restore from autobackup the scn and ckpt information is different.

Anyway a control file restored from a backup has an SCN taken at that "remote" time, different compared with those currently available in the datafiles and redo logs and so they have to be resynchronized.

To resynchornized controlfile with redologs and datafiles we need to do resetlogs and you know resetlogs: "RESETLOGS will initialize the logs, reset your log sequence number, and start a new "incarnation" of the database."

Instance with status BLOCKED and RMAN-04006, ORA-12528, Instance "testdb", status BLOCKED, has 1 handler(s) for this service...

Instance "testdb", status BLOCKED, has 1 handler(s) for this service...

Instance with status BLOCKED and RMAN-04006, ORA-12528 dont be panic or worry with this error:

Solution: Solution is very simple.

When an instance within open mode: NOMOUNT, 
you see on Listener status the associated instance is listed as follow:

Instance "testdb", status BLOCKED, has 1 handler(s) for this service...

when db will become in open mode you'll not find furhter this error.

..other case, when you use RMAN to duplicate the database and try this connect:
rman target sys/password@source_db auxiliary sys/password@duplicated_db

RMAN-04006: error from auxiliary database:
ORA-12528: TNS:listener: all appropriate instances are blocking new connections


Solution here: Don’t try connect auxiliary duplicated_db over listener. 

Try with this:
set oracle_sid=duplicated_db
rman target sys/password@source_db auxiliary /

tns-12560 tns-00530 protocal adapter error windows

error: tns-12560 tns-00530 protocal adapter error on windows server.

solution: I received this error when I put new database entry in listener.ora file and restart listener. Listener throws this error tns-12560 tns-00530 protocal adapter error.

I tried many times with so many changes in listener.ora file but unable to start listener. Finally I get idea to start listener service from windows services , there I get hint. When I try to start services of listener it throws login failed error, it means some one change password of oracle user or Administrator user. 

I changed Administrator password in properties of listener service it resolve error and able to start listener services.

To change password and start listener service: From windows run give services.msc it'll redirect you to services, right click on listener service --> properties --> go to log on tab and change the password.

servicename example : OracleTNSListener

After change password right click on service and click on start to start listener service.

After upgrading to Oracle 12c database, I start getting ORA-28040: No matching authentication protocol.

1. In 12.1, the default value for the SQLNET.ALLOWED_LOGON_VERSION parameter has been updated to 11. This means that database clients using pre-11g JDBC thin drivers cannot authenticate to 12.1 database servers unless theSQLNET.ALLOWED_LOGON_VERSION parameter is set to the old default of 8.
3. This will cause a 10.2.0.5 Oracle RAC database creation using DBCA to fail with the ORA-28040: No matching authentication protocol error in 12.1 Oracle ASM and Oracle Grid Infrastructure environments.
5. Workaround: Set SQLNET.ALLOWED_LOGON_VERSION=8 in the oracle/network/admin/sqlnet.ora file.

Oracle Data Guard: Calculating Network Bandwidth

QUERY:

SELECT DT,
SUM(RB*8/3600000000*1.3) Mbps_REQ_A_DAY,
MIN(RB*8/3600000000*1.3) MIN_Mbps_REQ_AN_HOUR,
MAX(RB*8/3600000000*1.3) MAX_Mbps_REQ_AN_HOUR ,
AVG(RB*8/3600000000*1.3) AVG_Mbps_REQ_AN_HOUR
FROM(
SELECT TRUNC (COMPLETION_TIME) DT,
TO_CHAR (COMPLETION_TIME,’HH24′) HH,
SUM(BLOCKS*BLOCK_SIZE) RB
FROM
V$ARCHIVED_LOG
WHERE COMPLETION_TIME > SYSDATE-5
AND DEST_ID=1
GROUP BY TRUNC(COMPLETION_TIME),
TO_CHAR (COMPLETION_TIME, ‘HH24′)
)
GROUP BY DT
order by DT;

——————————————————————————————–
OUTPUT:
========================================================================
DT        ||MBPS_REQ_A_DAY||MIN_MBPS_REQ_AN_HOUR||MAX_MBPS_REQ_AN_HOUR|| AVG_MBPS_REQ_AN_HOUR
————— ———————— ———————— ———————— ————————
20-JUL-12         1.40667756    .092599751               .757330034            .281335512
21-JUL-12         1.36889367    .092398592               .379794318            .136889367
22-JUL-12          .940478009   .072797412               .104935538            .094047801
23-JUL-12         3.23766921    .02369536                .855787065            .202354325
24-JUL-12         2.82066193    .067503673               .848231765            .176291371
25-JUL-12          .845672903   .045166137               .178660352            .08456729

Read Quran Koran Qura'n القران الكريم in English by Mohsin Khan

Read Quran Koran Qura'n القران الكريم in English by Mohsin Khan

Setup your Oracle Rac using Open Filer...Copy and Paste Post

Install openfiler O/S,it works like NAS and SAN
Install oracle enterprise linux on both rac nodes
Edit hosts file on both nodes and put entries and remove hostname from first line
vi /etc/hosts
172.22.0.175 rac1
172.22.0.176 rac2
172.22.0.178 rac1-vip
172.22.0.179 rac2-vip
172.22.0.177 openfiler
10.0.0.101 rac1-priv
10.0.0.102 rac2-priv
:wq (save and exit)

Oracle group and user add on both nodes
#groupadd dba
#groupadd oinstall
#useradd -c "Oracle software owner" -G dba -g oinstall oracle
#passwd oracle

Both the group and userid same on both rac nodes
issue the below command to check
#cat /etc/group (for groupid)
#cat /etc/passwd (for userid)
if not change this with below commands
#groupadd -g 1001 oinstall
#groupadd -g 1002 dba
#useradd -u 1001 -g 1001 -G 1002 -d /home/oracle -m oracle

setup sysctl.conf file for configuring kernel parameters on both nodes
kernel.shmmax=2147483648
kernel.shmall = 2097152
kernel.shmmni = 4096
kernel.sem=250 32000 100 128
fs.file-max=65536

net.ipv4.ip_local_port_range=1024 65000
net.core.rmem_default = 262144
net.core.rmem_max = 262144
net.core.wmem_default = 262144
net.core.wmem_max = 262144

net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_sack =1
net.ipv4.tcp_window_scaling = 1

sysctl -p

Download and run compat packages according to system 32bit or 64bit on both nodes
compat-gcc-7.3-2.96.128.i386.rpm
compat-gcc-c++-7.3-2.96.128.i386.rpm
compat-libcwait-2.1-1.i386.rpm
compat-libstdc++-7.3-2.96.128.i386.rpm
compat-libstdc++-devel-7.3-2.96.128.i386.rpm
compat-oracle-rhel4-1.0-5.i386.rpm
issue below command to run compat packages on both nodes
#rpm -ivh compat* --force --aid

Run below package on both nodes to check post installation of oracle RAC using cluvfy later,this package u will get in oracle clusterware software
#rpm -ivh cvuqdisk-1.0.6-1.rpm --force --aid

Create user-equivalence on both nodes
#su - oracle
$ssh-keygen -t rsa
enter
enter
enter
$cd .ssh/
$cat id_rsa.pub >>authorized_keys
$scp authorized_keys to node 2 on same location example:/home/oracle/.ssh
like this create user-equivalence on 2nd node

Check the time on both nodes it should be same if not give below command to make time synchronise
#date 102812542009.35 (the time format is like this monthdatehourminyear.second)

After installing openfiler you get the url like this https://openfiler:446/ or https://172.22.0.177:446/
Copy and paste this url to open storage graphically
First step click on system and configure network access configuration
hostname ipaddress subnetmask share
rac1 172.22.0.175 255.255.0.0 share
rac2 172.22.0.176 255.255.0.0 share
and click on update

Second step click on services and modify
servicename status modification
iscsi disable enable
click on enable in modification column to make status enable
like this enable all services except UPS server

Third step click on block devices
click on edit disk
/dev/hdc
now you will get new screen create primary and logical space
mode
primary extended create
click on create
again you will get
mode
logical physical create
click on create

Fourth step click on volume groups
give volume group name
click on add volume group
click on create

Fifth step click on add volume
give volume name
give volume Description
give Required space(MB)
give File system iscsi
click on create

Sixth step click on ISCSI targets
click on Target IQN and click on add
click on LAN mapping and click on map
click on Network ACL and click allow on access column and finally click on update to complete configuration

Add parameter on both nodes in iscsi.conf file
#vi /etc/iscsi.conf
add this line
DiscoveryAddress=openfiler

After configuration openfiler and add line in iscsi.conf you will get sharing disk on both nodes issue below command as a root user to check

#fdisk -l
(the output shows sharing disk as contains not a valid partition)

Partitions creating on sharing disk

#service iscsi restart
#fdisk -l
#fdisk /dev/sdb
p (type p to print partition)
n (to create new partition)
p (to create primary partition)
1
enter
enter
+2048m (give size and enter this partition is for ocr information)
n
p
2
enter
enter
+2048m (give size and enter this partition is for voting disk information)
n
p
3
enter
enter
+14000M (give size and enter this partition is for data)
n
e (this is extended partition)
enter
enter
n
enter
+25000m (give full remaining space is for data)
:w (save and exit)
#partprobe /dev/sdb (is for update kernel)
#fdisk -l (here you will get mount points)
#mkfs.ext3 /dev/sdb1 (make ocr and voting disk in ext3 format)
#mkfs.ext3 /dev/sdb2

Give this entry and reboot system once to create logical disk on follwing location on both nodes)
#vi /etc/sysconfig/rawdevices
/dev/raw/raw1 /dev/sdb1
/dev/raw/raw2 /dev/sdb2
/dev/raw/raw3 /dev/sdb3
/dev/raw/raw4 /dev/sdb4
:wq
#services iscsi restart
#services rawdevices restart
#chown root.oinstall /dev/raw/raw1 (give permissions to all logical devices for raw1 give root.oinstall because here information of ocr)
#chown oracle.oinstall /dev/raw/raw2
#chown oracle.oinstall /dev/raw/raw3
#chown oracle.oinstall /dev/raw/raw4

login as oracle user and check pre and post installation using cluvfy
$/home/oracle/clusterware/cluvfy/runcluvfy.sh stage -pre crsinst -n rac1,rac2 -verbose (for pre installation)
$/home/oracle/clusterware/cluvfy/runcluvfy.sh stage -post hwos -n rac1,rac2 -verbose (for post installation)
output shows preinstallation checking successfully completed so we can continue installing clusterware software,if it show unsuccessfully check the errors.
If u get error like user equivalence failed again create keygen and copy on both nodes.If u get error like couldn't find a suitable interfaces for vips.We
can ignore this error and create vip manually using vipca.This error gets due to:-
CVU checks for the following criteria before considering set of interface:
-the interfaces should have the same name across nodes.
-they should belong to the same subnet and same netmask
-they should be on public (and routable) network
Oftentimes,the interfaces planned for the vip's are configured on 10.*.m172.16.*,172.31.*or192.168.* networks which are not routable.Hence CVU does not
consider them as suitable for vip's.If name of the available interfaces satistfy this criteria,cvu complain "error-couldn't find a suitable set of interfaces
for vip's.It is worth nothing that,such addresses will actually work if things are public but cvu just things they're private and reports accordingly.To
invoke vipca go to $ORA_CRS_HOME/bin and run the following command as root user after *.sh scripts are run on both nodes at cluster software installation.
#./vipca
1)click on next button
2)select eth0 and click on next button.
3)Type in the IP alias name for the vip and IP address and click on next
4)lastly click on finish
This will configure startup the vip.Now you can go back to the first screen (means last screen of clusterware software) and click ok.
http://www.idevelopment.into/data/Oracle/DBA_tips/Oracle10gRAC/CLUSTER_18.shtml

Installation clusterware software:
$cd /home/oracle/cluster/
$./runInstaller
u will get window like specify cluster configuration
click on add
public node name (give in bracket(rac2))
private node name (give in bracket(rac2-priv))
virtual host name (give in bracket(rac2-vip))
and click on ok to continue
u will get next window like specify oracle cluster registry(ocr) location
select on external redundancy and on next line give location
specify ocr location /dev/raw/raw1 and click on next to continue
u will get next window specify voting disk location
select on external redundancy and on next line give location
voting disk location /dev/raw/raw2 and click on next to continue
u will get next window click on install to start installation
At the end u will get window to run root.sh and Orainstroot.sh on both nodes with root user
After running this scripts if u r getting error in pre requistion like couldn't find a suitable interfaces for vip's so configure vip using vipca it resides
in clusterware software bin folder and configure vip's as explain above in this note.
Finally u will get window installation completed successfully
OCR :- keeps information of number of rac nodes
Voting Disk :- Cluster processes vote we are alive.It ups another nodes background process if existing nodes fails.

Installation of ASM:
Using normal 10g software install asm
$/home/oracle/oracle10gsoftware/runInstaller
u will get first window select enterprise edition and click on next
u will get second window specify the location of asm to install ex:/home/oracle/product/10.2/asm
u will get next window specify hardware cluster installation mode
select cluster installation,click on rac2 and finally click on next to continue
u will get next window select configure automatic storage management(ASM)
give password specify asm sys password (sys)
give conform password (sys) and finally click on next to continue
u will get next window select on external
on same window select candidates and also select 1st and 2nd point and click on next to continue
u will get next window to run root.sh on both nodes as root user
finally u will get installation completed successfully click on exit to complete installation

Creating ASM database
$export PATH
$export CLASS_PATH
$export LD_LIBRARY
$dbca if not works go to $ORACLE_ASM/bin and run
u will get 1st window select cluset Real Application and click on next
u will get next window select configure automatic storage management
the output shows rac1 and rac2 on same window and click on select all to continue
u will get next window give password:sys and click on next to continue
u will get next window in that u will get by default Disk group name DATA
in the same window select external
in the same window select show candidates it will give output of third and fourth logical derives like /dev/raw/raw3 /dev/raw/raw4
By default i think selected if not select on both and click on ok to continue
u will get next window click on finish to complete asm instance creation.

Installation of Normal Oracle 10g software
$/home/oracle/oracle10gsoftware/runInstaller
u will get window Specify Hardware Cluster Installation Mode select on cluster installation
in the same window u will get rac1 and rac2 by default it is selected if not select both rac1 and rac2 and click on select all to continue
u will get next window click on next to continue
u will get next window click on next to continue
u will get next window select configuration option select install database software only and click on next to continue
u will get next window click on install to complete installations

Creation of database
$export ORACLE_HOME=/home/oracle/product/10.2/db_1
$export PATH=$ORACLE_HOME/bin:$PATH:$HOME/bin
$dbca
u will get first window select oracle RAC and click on next to continue
u will get next window select on create database and click on next ot continue
u will get next window in that u will get by default rac1 and rac2 and click on select all to continue
u will get next window select general purpose and click on next to continue
u will get next window write dbname and click on next to continue
u will get next window click on next to continue
u will get next window give password and click on next to continue
u will get next window select automatic storage management and click on next to continue
u will get next window specify sys password specific to asm give password and click on next to continue
u will get next window select DATA and click on next to continue
u will get next window select on use common location +DATA and click on next to continue
u will get final window db creation completed successfully
u will get prod1 instance on rac1 and prod2 instance name on rac2
u will get dbname prod on both nodes
put the instance entries in /etc/oratab on both nodes
for ex:prod1:/home/oracle/product/10.2/db_1

to check status of resources
#/home/oracle/product/10.2/crs/bin/crs_stat -t

to stop all resources
#/home/oracle/product/10.2/crs/bin/crs_stop -all

to check daemons
#/home/oracle/product/10.2/crs/bin/crsctl check crs

to stop daemons
#/home/oracle/product/10.2/crs/bin/crsctl stop crs

to stop services
#service iscsi stop
#service rawdevices stop

to start services
#service iscsi start
#service rawdevices start
#chown root.oinstall /dev/raw/raw1
#chown oracle.oinstall /dev/raw/raw2
#chown oracle.oinstall /dev/raw/raw3
#chown oracle.oinstall /dev/raw/raw4

vi editor to change from existing to new
:%s/stop/start/g or
:1,$s /stop/start

To uninstall RAC
1)stop crs on both nodes
2)#/home/oracle/product/10.2/crs/install/rootdelete.sh local nosharedvar nosharedhome on bothnodes
3)rm -rf /etc/ora* on both nodes
4)rm -rf /var/tmp/.oracle on both nodes
5)rm -rf /crs /db_1 /asm
6)rm -rf /etc/inittab.no*
7)rm -rf /home/oracle/oraInventory
8)ps -ef|grep pmon
crs
init.d
oracle
$kill -9
9)dd if=/dev/o of=/dev/raw/raw1 bs=8192 count=5000
10)remove if available .crs .cssd .ocmd in /etc/rco.d

To check performance of i/o harddisk.
$dd if=/dev/zero of=/pyrosan/eastdata/santest bs=1024k count=10000 (it copied 10gb file)