I have a simple question about database sessions. The value of parameter "sessions" is set to 500 and the users connect to database through an application server(Jboss). There are more than 500 users connect to the database through application.
My question is, how more than 500 users can connect to the database without any issue, if we set the value of "sessions" parameter to 500?
We have quite a number of sessions in database MES (production) coming from another machine.
From v$session, the program is oracle@WID27 (TNS V1-V3). This WID27 (hostname) consists of quite a number of development databases inside. We have to trace which jobs are actually triggering this, as WID27 are not suppose to connect to production databases.
How can we tell whether the sessions came in is from dblink or from the machine itself?
We have migrated database data from physical servers to virtual servers. i want to ensure all database parameters are set correctly in both physical and vblock servers. My question is what are all the parameters need to check and compare in both servers to ensure database from both servers ( physical/vblock ) are in sync.
Database used -- RAC database
OS used -- RHL 5.7
My application is opening a lot of sessions in my DB server. I applied resource_limit=true and idle_time=15 min. ans assign this profile to all application user.
Now I am seeing a lot of sessions having status sniped in v$session.
I want to clean up these sniped sessions and what they mean.
I am using oracle 10g as server in my lab. I faced some problems initially, but later after increasing the USERS tablespace it is working fine.
But there is still one problem. During the query execution some queries will be blocked and it doesn't leave any consequent queries to execute from the same user.
The blocked sessions will be displayed in the admin page under blocking sessions link. There is a option to kill the session. But when i do that, it affects all the users and the connection will be lost to all the users. again I have startup the database from beginning.
We had an issue last week were we had a session with a very basic SQL query lock up the database, spiking the CPU at 100%. When you would kill the session, the lock would just jump to another session and so on. We finally had to restart the database since our clients were being kicked out. After the restart of the database, the LGWR ended up locking and held the CPU between 85-95%. The archive logs were switching every 5 minutes, when normally it would be every 45min. We spoke with Oracle Support, but they just ended up brushing the issue off and saying it was a hardware issue and were not able to provide any kind of backing to that.
View 4 Replies View RelatedI got the attached issue in Win 08 server when setting up 11g express.
Have you ever encountered the same?
Using UTL_MAIL package.
My server version is:- 10.2.0.3.0
Here is the INIT Parameter file.
My question is, how it will affect if I configure the UTL_MAIL package by executing the Scripts ("utlmail.sql" and "prvtmail.plb")? And setting the Parameter SMTP_OUT_SERVER=''?
I have a table with counter value which will be incremented or decremented by several application servers.
SQL> select * from test;
COUNTER
----------
10
Application servers(multiple servers) will be running update against this row for increasing the counter value or decreasing the counter value.
update test set counter=counter+1;
update test set counter=counter-1;
update test set counter=counter+1;
update test set counter=counter+1;
So when update happens concurrently to this table will the counter value gets messed up?
I did a small test by opening multiple sessions for running update and the result I got for above update statement was 11,10,11,12.
But our developer is bit skeptical about this approach and he is using select for update and then updating the row.
Which approach will be better?
I'm sure you are all familiar with proxy users, they've been around since 9i: orcl> create user low identified by low;
User created.
orcl> create user high identified by high;
User created.
orcl> grant dba to high;
Grant succeeded.
orcl> alter user high grant connect through low;
User altered.
orcl> connect low[high]/low
Connected.
orcl> sho user
USER is "HIGH"
orcl>
Is there any way that I can find out which of the current sessions was proxied, and through what user? I know that from within the session I can query my userenv context and find out, but I can't see how to do it otherwise. It must be possible: the audit trail records both the real user and the proxy user.
I killed some 70 sessions which where inactive couple of days ago using alter system kill session(sid,serial#) immediate;
But even after killing them it still exists in the v$session view when I query select sid,serial# from v$session where username is not null; It has the same sid and serial#....I tried killing them every now and then but it still shows those exists
The Oracle Instance gets down while setting the Resource_manager_plan with internal error in trace file:
SQL> ALTER SYSTEM SET RESOURCE_MANAGER_PLAN='EST_EXEC_TM';
ALTER SYSTEM SET RESOURCE_MANAGER_PLAN='EST_EXEC_TM'
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Trace File Log:
error 600 detected in background process
ORA-00600: internal error code, arguments:
[kkkdplr:!efn], [1279729], [], [], [], [], [], []
Where as same is working in other server.
Users are reporting that are unable to use the NVARCHAR(4000) due to the character set which is set in the database.
Currently NLS_CHARACTERSET is set to AL32UTF8
and NLS_NCHAR_CHARACTERSET from AL16UTF16
They want me to change both the character set to UTF8, so that they can use the NVARCHAR2(4000) datatype in their tables.
As UTF8 is the subset characterset and I did the cs scan and this found characterset can't be modified to UTF8 and there may be the data dictionary corruption.
Is there any other way so that users can use the NVARCHAR(4000) as datatype. And the reason why NVARCHAR2 is required is, users are trying to import the data from other database which is using NVARCHAR(4000) as one of the field.
I've been trying to setup ASM disks for two node cluster using ASMLib. It's a multipath environment
Quote:multipath -ll
mpath2 (36842b2b000528f8d0000029b4ccead44) dm-1 DELL,MD32xx
[size=280M][features=3 queue_if_no_path pg_init_retries 50][hwhandler=1 rdac][rw]
\_ round-robin 0 [prio=100][active]
\_ 1:0:0:1 sdc 8:32 [active][ready]
\_ round-robin 0 [prio=0][enabled]
\_ 1:0:1:1 sdl 8:176 [active][ghost]
[code]....
I've been following Metalink note 602952.1, 309815.1 and 605828.1
metalink note 602952.1 states Quote:Note: Keep in mind for ASMLIB disks you will need to use the /dev/dm-* disks instead of the /dev/mapper/mpath* devices since they are present in the partition table ==)> /proc/partitions and ASMLIB will look at that file during the disk discovering phase. If you do not use the disks located at /dev/dm-* then ASM will not be able to discover them. and to create ASM disks with Quote:/etc/init.d/oracleasm createdisk DISK1 /dev/dm-<disk><partition> Also further stating Quote:NOTE: When scanning, only the device names known by the kernel are scanned. With device-mapper, the kernel sees the devices as /dev/dm-XX. The /dev/mapper/XXX names are created by udev for human readability. Any configuration of ORACLEASM_SCANORDER or ORACLEASM_SCANEXCLUDE must use the dm prefix.My environment is RHEL5 and towards the end of the note it says Quote:Note: On release RH 5 the /dev/dm-N devices are not persistent, starting, these devices are no longer created by udev. So release RedHat 5 you can create the ASMLIB disks on the /dev/mpath/<partition> or /dev/mapper/<partition>
Example:
# /etc/init.d/oracleasm createdisk VOL1 /dev/mpath/sata01p1
Or
# /etc/init.d/oracleasm createdisk VOL1 /dev/mapper/mpath2p1
Therefore I created a ASM disk using /dev/mapper path and it is only visible on the node it was created. Even after scandisks on other node it is still not visible when listdisks/oracleasm-discover
I've also tried creating the asm disks with dm-12 option and the same, disk get created but not visible on the other node.
Moreover if I restart the oracleasm restart the disk disappears from the node that it was visible Quote:
[root@db2 ~]# /etc/init.d/oracleasm createdisk vol1 /dev/mapper/mpath6p1
Marking disk "vol1" as an ASM disk: [ OK ]
[root@db2 ~]# ls -l /dev/oracleasm/disks/*
brw-rw---- 1 oracle dba 253, 12 Nov 8 10:22 /dev/oracleasm/disks/VOL1
[root@db2 ~]# /etc/init.d/oracleasm scandisks
Scanning the system for Oracle ASMLib disks: [ OK ]
[code]....
But disk lable is there and could be seen from both nodes on the same partition Quote:
head /dev/mapper/mpath6p1
VOL1ORCLDISKVOL1
My suspicion is on multipath configuration. I've tried both (not at the same time) combinations given below.
Quote:ORACLEASM_SCANORDER="dm"
ORACLEASM_SCANEXCLUDE="mpath mapper sd sda sdb"
and
Quote:ORACLEASM_SCANORDER="mapper"
ORACLEASM_SCANEXCLUDE="mpath dm sd sda sdb"
But still the problem is there, (disks disappears when asm is restarted and never visible on the "other" node).
I am reading in a selection of parameters. I have created a new variable which I want to set according to the value of one of the input parameters.
I am doing this straight after declaring the variable, but before the cursors and BEGIN statement It is throwing an error when I do this - but I have to do it before the cursors.the variable I am setting is: v_fptransType you can see the IF statement towards the end of the code.
the error I am getting is:Error(28,3): PLS-00103: Encountered the symbol "IF" when expecting one of the following: begin function package pragma procedure subtype type use <an identifier> <a double-quoted delimited-identifier> form current cursor The symbol "begin" was substituted for "IF" to continue.
beginning of the
create or replace
PROCEDURE "P_GLPOST" (i_entity IN varchar2, i_transType IN varchar2, i_startDate IN VARCHAR2,
i_endDate IN VARCHAR2, i_accountPeriod IN VARCHAR2, i_includeInternals IN NUMBER, i_chargeable IN NUMBER, i_trialPost IN NUMBER,
i_postingReport IN NUMBER, TESTER IN VARCHAR2) is
--set serveroutput on size 1000000;
[code].....
If I have to create a database on server which has already 5 databases running , how will I set the memory (pga,sga) values . AFAIK it depends on o/s is linux and database version is 10g and 11g .
1)free avaialble memory on server .
2)kernel parameters .
what else has to be considering while initialize memory parameters .
I am planning to set QUEUESIZE parameter in listener.ora. In a non-rac database, we can set in %ORACLE_HOME%/network/admin/listener.ora
(ADDRESS = (PROTOCOL = TCP)(HOST = servername)(PORT = portnumber)(QUEUESIZE=n))
How to set the QUEUESIZE in a RAC Database with SCAN feature. listener.ora inside the grid home contains the following information
LISTENER_SCAN3=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN3)))) # line added by Agent
LISTENER_SCAN2=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN2)))) # line added by Agent
LISTENER=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER)))) # line added by Agent
LISTENER_SCAN1=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN1)))) # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN1=ON # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER=ON # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN2=ON # line added by Agent
ENABLE_GLOBAL_DYNAMIC_ENDPOINT_LISTENER_SCAN3=ON # line added by Agent
and the endpoints_listener.ora contains the following (edited the host and ip details for maintaining confidentiality)
LISTENER_HOSTDB02=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=hostdb02vip)(PORT=1521))(ADDRESS=(PROTOCOL=TCP)(HOST=<ip of hostdb02>)(PORT=1521)(IP=FIRST)))) # line added by Agent
As per my understanding, QUEUESIZE parameter can be set inside the endpoints_listener.ora
how to make changes in a oracle 11g rac environment.
regarding sizing undo tablespace and undo_retention parameter.we have to implement the database in production system with 40 users but how much space should be allocated to undo tablespace is there any propotions related to virtual memory and the
parameter.i have gone thru oracle doc's and some related sites.its an ERP aplications that contains 20 modules .I am an new one to this dba level
I often use "alter session set xxx=xxx;" command to change parameter value temporarily. After that, how to reset parameter value to default and I don't want logout sqlplus.
View 3 Replies View RelatedSQL> alter system set sga_max_size=1G scope=spfile;
System altered.
SQL> startup force
ORA-12545: Connect failed because target host or object does not exis
SQL> show parameter sga
ERROR:
ORA-03114: not connected to ORACLE
SQL> startup force
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
SQL> startup
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
SQL> startup force
ORA-24324: service handle not initialized
ORA-01041: internal error. hostdef extension doesn't exist
How to change db timezone parameter. My application team has asked me to change the db timzone parameter by following sql.
ALTER database SET TIME_ZONE = '+10:00';
Is this way is the correct one , and do we have any impact on database and does it require a db bounce.
It always used to be that Automatic Memory Management and Linux huge pages were incompatible: you had to use one or the other. But 11.2.0.2 has new parameter, USE_LARGE_PAGES. This isn't documented apart from a few articles on metalink, but Googling it suggests that if it is on TRUE (the default) or ONLY then I can use AMM with huge pages.
View 3 Replies View RelatedI have a question ragarding undo tablespace. I want to ask that why only undo tablespace information we need to specify in parameter file. We do not specify any other tablespace information. Not even for temporary tablespace. Then why we need to give undo tablespace name while instance is creating.
View 5 Replies View Relatedwhich initializaion parameter cant be change after creating the database?
View 5 Replies View RelatedWhen I list the parameters with "show parameter", I get only numeric value for hash_area_size with no unit, what is the unit for that value and conversion of it to MegaBytes.
View 3 Replies View RelatedI want to change cursor_sharing, open_cursors and session_cached_cursors parameter values for SPFILE (Only SPFILE) using SQL Query.
I have found following SQL Queries, but I don't know these queries are only for SPFILE or not.
ALTER SESSION SET cursor_sharing='EXACT';
ALTER system set open_cursors=2500;
ALTER SESSION set session_cached_cursors=70;
I need SQL Queries only for SPFILE.
quick check on a hidden parameter? I need to know the default value and possible values for _serial_direct_read on various releases, I have only 11.2.0.3 available right now and I'ld like to know this for 11.2.x.x 11.1.x.x, and 10.2.x.x.
Below is the query that will show what it is currently which (unless you've changed it) will be the default: auto for my 11.2.0.3. Then to see the options, try to set it to something wrong, my options are false/true/never/auto/always. I think false/true were the only choices for 10.2 and are maintained only for compatibility. But I can't rememebnr 11.1.
orcl>
orcl> set lin 80
orcl> select KSPPSTVL from x$ksppcv join x$ksppi using (indx) where ksppinm='_serial_direct_read';
KSPPSTVL
--------------------------------------------------------------------------------
auto
orcl>
orcl> alter system set "_serial_direct_read"=rubbish;
alter system set "_serial_direct_read"=rubbish
*
ERROR at line 1: ORA-00096: invalid value RUBBISH for parameter _serial_direct_read, must be from among false, true, never, auto, always
orcl>
update: added 11.1.x.x to my wishlist
I am getting the following error while starting database.
ORA-32004:obsolete and/or deprecated parameter(s) specified
How oracle deals with the setting of init.ora parameter compatible.
e.g. we have
DB Version=10.2.0.4
compatible=10.2.0
what is the possible leak for us ? Is there any description about the features changed in 10.2 up to 10.2.0.4 in all steps - so that we can check out which functions we do not have.
I have a question about spfile.
SQL> SELECT COUNT(*) FROM v$parameter WHERE value IS NOT NULL;
COUNT(*)
----------
246
SQL> SELECT COUNT(*) FROM v$spparameter WHERE value IS NOT NULL;
COUNT(*)
----------
20
v$parameter displays information about the initialization parameters that are currently in effect for the session,but v$spparameter displays information about the contents of the spfile.I want to know why the count of parameters whose values are not null in v$parameter is greater.where are they from? My initialization parameter file is spfile.