Database – Page 40

ASM, Database, Linux, RAC | Data Guard, Shell Scripts

Kludge: Mounting ACFS Thought Shellscript

By matheusdba 25 de October de 2015 21 de April de 2020

Just the script. The history is here.
This is a “workaround” script. As always, is recommended to use Oracle Restart, like I posted here.

#!/bin/sh
$GRID_HOME/bin/srvctl add filesystem -d /dev/asm/dbhome-270 -g 'DGHOME' -v DBHOME -m /oracle/db -u oracle
if [ $? = "0" -o $? = "2" ]; then
$GRID_HOME/bin/srvctl start filesystem -d /dev/asm/dbhome-270
if [ $? = "0" ]; then
chown oracle:oinstall /oracle/db
chmod 775 /oracle/db
$GRID_HOME/bin/srvctl status filesystem -d /dev/asm/dbhome-270
exit 0
fi
$GRID_HOME/bin/srvctl status filesystem -d /dev/asm/dbhome-270
fi

There is a good post ACFS and ACFS restart scripting:
https://levipereira.wordpress.com/2011/07/28/oracle-acfs-filesystem-managed-by-ohas-on-oracle-restart/

See ya!

Matheus.

Backup and Restore, Database, Errors and Bugs, Tools

DDBoost: sbtbackup: dd_rman_connect_to_backup_host failed

By matheusdba 24 de October de 2015 21 de April de 2020

A common error. It happens when the datadomain host or mtree is unreachable.
For the first situation, contact the OS/Network administrator. Is can be a firewall limitation, DNS miss (if using DNS hosting) or, in some cases, networks physically unreachable.

For the second case, try to [re]send user/pass to access datadomain:

Starting backup at 24-OCT-15
using target database control file instead of recovery catalog
allocated channel: ORA_SBT_TAPE_1
channel ORA_SBT_TAPE_1: SID=191 instance=almdbdw_1 device type=SBT_TAPE
channel ORA_SBT_TAPE_1: Data Domain Boost API
allocated channel: ORA_SBT_TAPE_2
input datafile file number=00001 name=+DGMYDB/almdbdw/datafile/system.267.849463017
channel ORA_SBT_TAPE_1: starting piece 1 at 22-JUL-15
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_SBT_TAPE_1 channel at 10/24/2015 10:03:50
ORA-19506: failed to create sequential file, name="a4qcme1l_1_1", parms=""
ORA-27028: skgfqcre: sbtbackup returned error
ORA-19511: Error received from media manager layer, error text:
 sbtbackup: dd_rman_connect_to_backup_host failed
channel ORA_SBT_TAPE_1 disabled, job failed on it will be run on another channel

Sending user/password to acess data domain as follow and, after that, re-run the your action.

RUN {
ALLOCATE CHANNEL t1 TYPE SBT_TAPE PARMS 'BLKSIZE=1048576, SBT_LIBRARY=$ORACLE_HOME/lib/libddobk.so,ENV=(STORAGE_UNIT=$STORAGE_UNIT,BACKUP_HOST=$DATADOMAIN_HOST,ORACLE_HOME=$ORACLE_HOME)' FORMAT '%U-%d';
send 'set username $DDBOOST_USER password $PASSWORD servername $DATADOMAIN_HOST';
RELEASE CHANNEL t1;
}

Hugs!

Matheus.

Linux, Migration | Upgrades | Patching, Shell Scripts

Flush DNS on Linux

By matheusdba 24 de October de 2015 21 de April de 2020

I began posting about ORA-12514 after database migration involving DNS adjustment.
Then, to make it more clear I wrote about How to Flush DNS Cache.

Now, just a complementar information that can be usefull:

# To invalidade DNS Cache:

ls /var/db/nscd/
group hosts netgroup passwd services
 
nscd --invalidate=hosts  (or -i hosts)

Hugs!

Matheus.

Database, RAC | Data Guard, SQL | PLSQL

Scheduler Job by Node (RAC Database)

By matheusdba 23 de October de 2015 21 de April de 2020

Sometimes you want to run something just in one node of the RAC. Here is an example to do it:

create or replace procedure USER_JOB.PRC_SOMETHING is
begin
-- do something
null;
end;
/

begin
sys.dbms_scheduler.create_job(job_name => 'USER_JOB.JOB_SOMETHING',
job_type            => 'PLSQL_BLOCK',
job_action          => 'USER_JOB.PRC_SOMETHING;',
start_date          => sysdate,
repeat_interval     => 'Freq=Minutely;Interval=30',
end_date            => to_date(null),
job_class           => 'DEFAULT_JOB_CLASS',
enabled             => true,
auto_drop           => false,
comments            => 'Something Job.');
end;
/

begin
dbms_scheduler.set_attribute(name => 'USER_JOB.JOB_SOMETHING',
 attribute=>'INSTANCE_ID', value=> 1);
end;
/

Matheus.

ASM, Database, RAC | Data Guard, Tools

CRSCTL: AUTO_START of Cluster Services (ACFS)

By matheusdba 22 de October de 2015 21 de April de 2020

As I sad long time ago (Manually Mounting ACFS)… Here is it:

To set autostart of a resource (in my case an ACFS) by CRSCTL, here the simple example:

# Check How it is currently configured:

[root@db1database1p bin]# ./crs_stat -p ora.dghome.dbhome.acfs |grep AUTO_START
AUTO_START=restore

# Set Autostart (and check):

[root@db1database1p bin]# ./crsctl modify resource ora.dghome.dbhome.acfs -attr AUTO_START=always
[root@db1database1p bin]# ./crs_stat -p ora.dghome.dbhome.acfs |grep AUTO_START
AUTO_START=always

It can be done also with “AUTO_START=1”. We have 3 possibilities (always, restore and never).

# KB
http://docs.oracle.com/cd/E11882_01/rac.112/e16794/resatt.htm#CWADD91444

Matheus.

Database, Errors and Bugs, Linux, RAC | Data Guard, Shell Scripts

TFA – Collecting Period

By matheusdba 22 de October de 2015 21 de April de 2020

I like quick posts, you already know that. It’s like a quick memo to myself in the future. 🙂

Here is a simple example to collect files with TFA by date interval:

tfactl diagcollect -all -from "Jul/24/2015 15:30:00" -to "Jul/24/2015 16:30:00"

See ya!

Matheus.

Database, Errors and Bugs, Security, SQL | PLSQL

ORA-28004: invalid argument for function specified in PASSWORD_VERIFY_FUNCTION

By matheusdba 21 de October de 2015 21 de April de 2020

An unexpected error, right?

SQL> CREATE PROFILE TEST_PROF LIMIT
FAILED_LOGIN_ATTEMPTS 5
PASSWORD_LIFE_TIME 180
PASSWORD_GRACE_TIME 30
PASSWORD_REUSE_MAX 15
PASSWORD_VERIFY_FUNCTION fnc_validation;
CREATE PROFILE TEST_PROF LIMIT
*
ERROR at line 1:
ORA-28004: invalid argument for function specified in PASSWORD_VERIFY_FUNCTION FNC_VALIDATION

That is a simple need. You have to use 3 parameters on function: username varchar2, password varchar2, old_password varchar2.

Matheus.

Linux, Migration | Upgrades | Patching, Windows

Flush DNS Cache

By matheusdba 11 de October de 2015 21 de April de 2020

To flush DNS cache? Easy like that:

# Linux
1) Flush DNS – “Auto”

service nscd restart

2) Flush DNS – “Manual”

service nscd stop
rm /var/db/nscd/*
service nscd start

# Windows
1) Flush DNS

ipconfig /flushdns

For quick referece: http://www.cyberciti.biz/faq/rhel-debian-ubuntu-flush-clear-dns-cache/

Matheus.

ASM, Database, Errors and Bugs

Adding datafile hang on “enq: TT – contention”

By matheusdba 5 de October de 2015 21 de April de 2020

Yesterday a colegue asked me about “enq: TT – contention” event on his session that is adding a a datafile in a tablespace wich run out of space in a 11.1.0.7 Database.
I’ve faced this situation another time and decided to document it.

Oracle refer Bug 8332021 : CANNOT ADD A DF WHEN SESSIONS ARE REPORTING ORA-1653 ON 11.1.0.7 for this situation.

The pointing solutions are:
– “Apply Patch 8332021”
– “Alternatively, you can upgrade to 11.2.0.2 or higher as the patch is included in the 11.2.0.2 patch set.”

The not documented workaround (just for you, by Matheus :D) is:
– Cancel session adding datafile.
– Extend any datafile to resume sessions waiting (in resumable state).
– Readd datafile.
This extend action relieves the blocks and will allow you to add the datafile.

Hugs!

Matheus.

Database, Errors and Bugs, Performance, SQL | PLSQL

Lock by DBLink – How to locate the remote session?

By matheusdba 24 de August de 2015 21 de April de 2020

And if you identify a lock or other unwanted operation by a DBLink session, how to identify the original session in remote database (origin dabatase)?
The one million answer is simple: by process of v$session. By the way, looks like is easier than find the local process (spid)… Take a look in my example (scripts in the end of post):

dest> @sid
Sid:10035
Inst:1
SEQ# EVENT MODULE STATUS SID SERIAL# INST_ID
----- --------- ---------- ---------- ---------- ---------- ----------
29912 SQL*Net message from client oracle@origin2(TNS V1-V3) INACTIVE 10035 35 1
dest> @spid
SPID SID PID PROCESS_FOR_DB_LINK MACHINE LOGON_TIME
------ ---------- ---------- ----------- ----------- -----------
16188960 10035 882 17302472 origin2 24/08/2015 07:43:40

Now I know the sid 10035 refers to local process 16188960 and the process on origin database is 17302472. What I do what I want if this process:

root@origin2:/oracle/diag/rdbms/origin/origin2/trace>ps -ef |grep 17302472
grid 17302472 1 97 07:42:42 - 5:58 oracleorigin2 (LOCAL=NO)
root 24445782 36700580 0 08:05:45 pts/3 0:00 grep 17302472

What include to locae the session in the database by spid, see the sql, and etecetera:

origin> @spid2
Enter value for process: 17302472
SID SERIAL# USERNAME OSUSER PROGRAM STATUS
------- ---------- ----------- ----------- --------------- ----------
7951 41323 USER_XPTO scheduler_user sqlplus@scheduler_app.domain.net (TNS V1-V3) ACTIVE
database2> @sid
Sid:7951
Inst: 2
SQL_ID SEQ# EVENT MODULE STATUS SID SERIAL# INST_ID
---------- ----- --------- ------- --------- ----- ------ ----------
1w1wz2mdunya1 56778 db file sequential read REMOTE_LOAD ACTIVE 7951 41323 2

That’s OK?
Simple isn’t?

The used Scripts (except the “sid”, that is a simple SQL on gv$session):

Get SPID and PROCESS FOR DBLINK from a SID:

# spid:
col machine format a30
col process format 999999
select p.spid,b.sid, p.pid, b.process as process_for_db_link, machine, logon_time
from v$session b, v$process p
where b.paddr=p.addr
and sid=&sid
/

Get SID from SPID:

#spid2:
SELECT s.sid, s.serial#, s.username,
s.osuser, s.program, s.status,
FROM v$session s, v$process p
WHERE s.paddr = p.addr
AND p.spid IN (&process);
/

See ya!
Matheus.