Exadata :: Exadata With Multi User
Jun 14, 2013I would like to know if I can create one OS user by ORACLE_HOME database ?
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Exadata :: Uncompress Sub-partition Table After Restoring Exadata To Non-exadata Storage?
Dec 24, 2012One of my databases which is running on exadata x2-2 , has been restored to non-exadata machine in order to test few things. I had a sub-partition table in the exadata , compressed for query high. test machine (NOT EXADATA) , after uncompressing this subpartiton tables i am getting the following err message :
ORA-64307: hybrid columnar compression is not supported for tablespaces on this storage type I have executed the following commands :
alter table crm.cm_ncd modify partition P01_CM_NCD nocompress;
alter table crm.cm_ncd modify partition P02_CM_NCD nocompress;
alter table crm.cm_ncd modify partition P03_CM_NCD nocompress;
[code]...
ERROR at line 1:
ORA-12801: error signaled in parallel query server P005
ORA-64307: hybrid columnar compression is not supported for tablespaces on this storage type If all the partitions are uncompressed why i am getting this error message ?
Exadata :: How To Find Exadata RACK Mode
Oct 17, 2013This is the below method which I have used to figure out exadata model.
ex: grep -i MACHINETYPES /opt/oracle.SupportTools/onecommand/databasemachine.xml <MACHINETYPES>X3-2 Half Rack HP</MACHINETYPES>
But for one environment, though it is a full rack but still I am getting result as half rack.
Exadata :: Import Data To Exadata
May 6, 2013I am having an Oracle 11g R2 RAC setup. My database size is 22TB in normal servers. I have checked my database in Exadata X2-2 and found out that the HCC was good and as per my assumption the 22TB can come down to 10TB .
My challenge is i need to transfer the 22TB data to the exadata quater rack which is having space constraint. Is there any way other than export & Import as data export and import will use entire 22TB. Is there any way to transfer the data to Exadata with compressed form from the source server.
Exadata :: NO_INDEX Hint In Exadata
Jul 19, 2013I am having doubt on the no_index concept in oracle. I am using oracle exadata server.It is basically data warehouse project.I am in the situation to join some tables and get the result set for reporting purpose.
Among the tables, 2 tables having huge count.1st table has more than - 1,000,000,000 rows2nd table has more than - 200,000,000 rows when i join these 2 tables with some small set of tables, it is taking long time (around 20 MIN) to retrieve the result set. The final result set is around 100 rows only.
But, when i force NO_INDEX hint in the same query, is giving the same result in very fast manner(around 5 MIN). Because it is working based on cell smart scan. So, can i force the NO_INDEX hint to all tables? I forced the NO_INDEX hint only the table which is contain 200,000,000 rows not for others.
Query Plan : Normal Query using the the range scan based on the key. No_INDEX Query going full table scan.
Exadata :: Task On Exadata
May 12, 2013Tasks need to performs are
1) Post Installation check list ie: How can I see every things are installed correctly.
2) upgrade the exadata OS version .
3) Upgrade the Database.
4) Test Migration from Oracle database to Exadata.
5) Right now there RAC servers are installed without domain, I need to add domain name to existing RAC.
Exadata :: How To Find Disks Are HC Or HP
Oct 21, 2013Is there any command to identify the disks are HC OR HP ? Indirectly i could find with the following exercise -
$ grep -i MACHINETYPES /opt/oracle.SupportTools/onecommand/databasemachine.xml <MACHINETYPES>X2-2 Half rack</MACHINETYPES> ASMCMD> lsdgState Type Rebal Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files NameMOUNTED NORMAL N 512 4096 4194304 18235392 10597264 2605056 3996104 0 N DATA/MOUNTED NORMAL N 512 4096 4194304 2087680 2085808 298240 893784 0 Y DBFS_DG/MOUNTED NORMAL N 512 4096 4194304 27240192 18871860 3891456 7490202 0 N RECO/ = 45TB >>
[URL] ....... >> Page 5 >> HP SAS disks
Exadata :: Resize ASM Diskgroup
Oct 9, 2012My exadata quarter rack machine has two asm diskgroups, DATA1 with 5TB and RECO with 3TB. I'd like to resize RECO to 1TB and DATA1 to 7TB.
I know ALTER DISKGROUP RESIZE command, but my question is about resize RECO volume from 3 to 1 TB: is it supported by Oracle?? Let me know risks /issues with this resize?
Exadata :: Tell Version Of Machine Connected To?
Mar 8, 2013How can I tell version of exadata machine I'm connected to? Mean whether X2, X3-2. X3-8 ....
example: machinemodel=X2-2 Full rack A file named config.dat is mentioned in this doc [URL]
but I could not find that file on server I'm connected to (DB Host)
Any command, file I could use to get machinemodel?
Exadata :: Configuring Dataguard With DR Server And DBM
Oct 10, 2012Refer a MOS Note for configuring data-guard on Exadata with DR server being and Exadata DBM too.
View 4 Replies View RelatedExadata :: Compress Sub Partition With Pctfree
Nov 12, 2012How to compress sub partition on exadata, using 'for query high' and pctfree 10 options? I used this statement, but I get only ORA-14160:this physical attribute may not be specified for a table subpartition.
alter table table_name move subpartition subpartition_name PCTFREE 10 compress for query high;
Exadata :: Compression And Partition Row Movement?
Mar 6, 2013If I have a Partitioned Table set as COMPRESS FOR QUERY/ARCHIVE HIGH what would be the impact when a row in Partition X has to move to Partition Y?
View 3 Replies View RelatedExadata :: Columns In Storage Indexes
Apr 22, 2013Exadata storage indexes stores eight columns in a table.
I am bit confused here, what will happen if I am having a table with 24 columns. In this case how does Storage indexes use these 24 columns.
whether three indexes will be created for this table?.
Exadata :: How To Get The Serial Numbers From Switches
Mar 20, 2013My management is wanting to know the serial numbers of all the components of our two Exadata machines: one quarter-rack V2 and one half-rack V1
I can use dmidecode to get the appropriate information for comp nodes and storage cells, but not for the Cisco/Voltaire switch, nor the IB switches. I read MOS 1299791.1 and the thought of asking a DOC operative to pull out the label ‘which could damage the switch’ worries me quite a bit.
Is it still true that we are unable to obtain the serial number for the IB switches and the Cisco/Voltaire switches from the CLI of the switches themselves? Sad face.
Exadata :: Enable OLTP Compression On Tables
Sep 2, 2012I am trying to enable OLTP compression on tables and at tablespace level for the tables
Steps I am following are:
1. Move indexes to its own tablespace
2. enable OLTP compression at table level:
alter table table_name move compress for OLTP
3. Rebuild indexes
4. Issue I have is what to do with tables with LOB columns
ALTER TABLE lob_table MOVE LOB (LOB_COL) STORE AS (TABLESPACE index_tbsp); -- Is this correct?
5. alter tablespace data_tablespace default compress for OLTP;
I have a question, is the sequence of steps correct. For tables with LOB columns do we needto move lobindex to index tablespace. Beacuse lobsegment and lobindex are created in data tablespace?
Exadata :: Gather Statistics In Parallel On Schema
Sep 7, 2012I am trying to gather stats in parallel on a schema in which tables are OLTP compressed
The command I use
BEGIN
DBMS_APPLICATION_INFO.set_module ('Gather Stats', user);
DBMS_STATS.GATHER_SCHEMA_STATS(ownname=>'schemaname', DEGREE=>64, estimate_percent => DBMS_STATS.AUTO_SAMPLE_SIZE, method_opt => 'FOR ALL COLUMNS SIZE AUTO', CASCADE => TRUE, GRANULARITY => 'AUTO');
END;
/
I see blocker with wait event=PX DEQ: Execution Msg
Waiter with wait event= PX Deq: Execute Reply
When I run ASH report all I see is : IPC send completion sync
Exadata :: Unallocated Space In All Storage Servers
Jul 31, 2012we have a quarter rack with 3 cell (storage) servers. Actually I don't know which exact disks we have inside.
How could I check if we have unallocated disk space in the storage server? I would like to do this command line.describe me the steps?
Networking And Gateways :: Switch Between Application Server And Exadata
May 1, 2011I configure exadata + 2 switch between application server and and exadata. And we have problem to connect to switch and load balancing between Ethernet switch to exadata.
We might end up that is 'How about remove ethernet switch and directly connect to exadata?' I don't know which idea comes up with Ethernet gigabit switch between application server and exadata, exadata might be gigabit.
but from application server to ethernet switch is still 100M network, it is only fast in that load, other load is still 100m , it might useless. and about load balancing, exadata is RAC cluster node, exadata is doing load balancing, why we want another load balancing feature of ethernet switch?
Is it good idea to have dual switch between application server and exadata? exadata iti is what might be pro and con of this setting? exadata is handled by oracle support team, but dual switch is only cared by application operation team, so if something wrong with switch, nobody except operation team can manage .
Exadata :: Dynamic Views For Flash Cache Usage?
Mar 19, 2013Despite it being one of the major selling points of Exadata (especially from X3 onwards), I'm struggling to find much information on our usage of the Exadata Smart FlashCache (I'm running RDBMS 11.2.0.2 BP7 on a V2 quarter-rack).
I can verify usage of the FlashCache by checking whether the object has been 'pinned' to the FlashCache via DBA_SEGMENTS and I can check for FlashCache usage by querying gv$sysstat (and even v$mystat), but are there other views that I could use? It seems a bit strange for Oracle not to provide the DBA all that much insight into their usage of this feature...
Exadata :: Find ACFS Supported But Is Not Mentioned For DBFS
Apr 23, 2013Does RMAN backupset (backup to ) on DBFS is supported. I can find ACFS supported but is not mentioned for DBFS. My current customer is thinking backup to DBFS then copy to tape as the interim solution before getting ZFS next year.
View 5 Replies View RelatedExadata :: DBFS Settings For Loading External Table
Aug 10, 2012if there is any particular DBFS settings to increase the performance on external table loading currently I have just mounted it with direction just looking for any other ways to improve the reading from the flat file that sits on dbfs on exadata x-2 half rack
View 1 Replies View RelatedExadata :: Estimate Storage Savings For Hybrid Columnar Compression?
Mar 27, 2013Is there a way to estimate the storage savings for Hybrid Columnar Compression (HCC) in Oracle Exadata x3-2 machine ?
View 5 Replies View RelatedExadata :: Monitoring Cell Server With OS Watcher / Other Command Line Tools
Aug 7, 2012we can't use the Exadata Plugin for Cloud Control but we need some monitoring of the Cell Servers.Does OS Watcher is the right tool or do we need ADRCI for incidents and so on.
What do have to install and what information do we get.
Exadata :: Move Partition From HP Disks To HC Disks
Jun 27, 2012We have Exadata -V2 quarter rack with High Performance Disks. We applied EHCC's various compression methods on some of the table's partitions.
Now we are setting up Exadata Expansion Rack - High Capacity Disks. Post implementation, we would be moving older partitions to new Expansion Rack wherein compressed partitions are also included.
In this case, would there be any impact on the compression ratio as the expansion rack is having high capacity disks.
And, moving partition method would be same as it is for non-exadata database i.e. "alter table <table_name> move partition
<partition_name> tablespace <tablespace_name>"
Automate Multi User Concurrent Data Loads
Nov 15, 2011We are designing a three tiered system (client, application/web server, database server) that will allow clients through a web interface to select a text file from the operating system and load that file into a intermediate table (import database table). Many users will do this concurrently and data will load into a single table. The text files come in monthly for about 100 firms. No user is able to insert or update the data of another users data (there is a check out system). Their are about 30 to 40 users that will be using the system doing various functions but it is possible for 10 to 20 users to import data at one time. The files can have anywhere from 2000 to 25000 records at a record length of 398.I am concerned about having a good design strategy as well as decent performance.
Problems with each of the Oracle loaders.
1) External tables - Can not read data text files on the application server(which is where they want the text files to go) secondly you cannot create a instance of a external table. Multiple users will be using the external table to point to different text files and loading at the same time.
2) Sqlloader - is mainly a OS level tool and I am not sure how I could programatically point it to a different text file each time a user wants to load. The client will have to have the ability through code to point sqlloader to the correct file name.
I had a creative approach and was wondering if this would work. I would like to use external tables just like a connection pool. I would propose first a scheduled OS job to move files to the database server. I would create about 20 external tables with 20 different directory objects. Using a stored procedure for the user to call and pass in file name and audit info as needed. I would use a Load lock pool table (my invention) to load the name or a code for the external table in use. The procedure loads this code into my load lock pool table when a external table is in use and deletes the name when the load is completed. The procedure would check through a series of if statements whether a particular external table was in use. If in use (exist in load lock pool table) I would check the next available external table until a external table not in use is encountered. Now potentially 20 users at one time but not likely would be laoding into the same table at one time.My questions
1) Could Oracle handle this strategy? What do I need to consider performance wise with the possibility of so many users loading into a single table at one time?
2) Do any of you maybe have another strategy to do this?
How To Do Multi-row Insert In Oracle
Dec 2, 2006I would like to find a way to do a multi row insert in Oracle similar to the examples below ... if possible.
Note that I need it to work with constant values and not values selected from (another) table (ref examples below).
In MySQL and DB2 I can do this:
insert into pager (PAG_ID,PAG_PARENT,PAG_NAME,PAG_ACTIVE)
values (8000,0,'Multi 8000',1),(8001,0,'Multi 8001',1)
In MSSQL, PostgreSQL, and SQLite I can do this:
insert into pager (PAG_ID,PAG_PARENT,PAG_NAME,PAG_ACTIVE)
select 8000,0,'Multi 8000',1 union all select 8001,0,'Multi 8001',1
SQL & PL/SQL :: Multi Column Distinct
Sep 16, 2010I need to select multiple columns but only have 2 of them which are distinct. For instance if i have
userid lastname firstname city country time
1 jones tom lon gb 2:25
2 wall paul la usa 2:30
1 jones tom lon gb 2:50
3 smith jane ny usa 2:55
what i would want to do is select all the columns but avoid duplicate lastname-firstname combination rows. The problem is if i use a group by i have to include all the columns and because time is different i will get tom jones twice. a way of getting round this so i can select all the columns but only 1 row of tom jones.
SQL & PL/SQL :: Multi Byte Conversion
Jun 2, 2012My application spools the data from database into file and file is fixed length. My application working fine when database has single byte characters. But I am getting fields postion misposition and length mismatch in spooled line when data base has Multi byte characters(ê).
I want to convert the multi byte characters into single byte while spooling the data( ê ==> e)
The below query has converted the multi byte to single byte character. But actual value is modified into lower case.
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select utl_raw.cast_to_varchar2((nlssort(c.Name,'nls_sort=binary_ai'))) sbyte, '|'
c.Name
from EMP c
viva! experiencias | Viva! Experiências
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Product User Profile - Restrict User From Running Queries On DB From Third Party Tools
Apr 25, 2011There is a requirement in my database that I want to restrict the user from directly running queries on database from third party tools such as pl/sql developer and toad.
There is a utility in SQL product_user_profile through which this can be done but it is only restricted if you run the query through sql plus. If I want to restrict and (give suppose select,insert) to a user for directly running queries through PL/SQL.
Server Administration :: Externally Authenticated User Login Syntax As Proxy User?
Nov 15, 2010I created an externally authenticated user in database. And can login without password with below syntax.
SQL> connect / @TESTDB
Connected.
SQL> show user;
USER is "SCOTT"
This scott user has a proxy permission to another DBuser PROXY_USER. Previously I used to login using below syntax.
connect scott[proxy_user]/password_for_scott@TESTDB
So now, what syntax should be used for this "ExternallY Authenticated" user to login as a proxy user?