Oracle Database suddenly very slow!

Hello,
After running our Oracle 10g instance on Red Hat Enterprise for more than two years without an itch it suddenly became extremely slow. A simple query that would take a few seconds now takes an hour to complete! It is not the network since the same happens from a local console.
I checked the log files on bdump and cdump but couldn't see anything wrong.
Any assistance would be much appreciated!
Thank you in advance.

hi,
do you perform the following
execute dbms_stats.gather_system_stats ('Start');
let the system do some typical work
execute dbms_stats.gather_system_stats ('Stop');
try running this and see what happens.
could you also post back some
vmstat 10 13
under typical work load and also some
sar figures
rgds
alan

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Oracle database is very slow and hangs sometime

I am using Oracle 11g on Red hat 5.2 . My RAM is of 6 GB and swap size is 12GB . When I checked the used RAM and Swap area by using $ free -m command it shows that enough free memory (almost 4990 GB and swap space (more than 10GB) is available to use. Then I checked an alert.log file as my database was hanged . It contains error like
1. audit commit delay exceeded oracle
2. unable to spawn jobq slave process oracle
3. maximum number of sessions exceeded
4. could not allocate new resource
My init.ora contains following parameters.
Processes =150
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Transactions = 220
memory_target = 2400m
sga_max_size = 1500m
sga_target = 0m
So, what steps i should take to stop database hanging and how can i boost slow performance ? Is there any problem with my resource manager and if so then how can i correct it?
Thanks
Tushar Lapani

Hi,
Please check the query
SELECT username,default_tablespace from dba_users;
Ususally the default tablespace of the user should not be in SYSTEM tablespace. This might cause performance issue. Create a seperate tablespace and alter/assign this user. Also must move all the objects from SYSTEM tablespace to this new tablespace which you created.
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Insert in oracle database issue (very urgent)

Hello
I am new to this forum and also new to oracle .... I am woking in a C# 3.5 desktop application
I am Leasing data from socket (1 message per 10 millisecond) and save in queue<T> and then i have a background thread which dequeu the data and perform some calculation and create “insert sql query “ on run time NO STORE PROCEDURE just simple insert query
For example
insert into Product values(0,computer , 125.35);
I pass that insert query to my datalayer which create oracle connection and insert in to a data base. see the code below
using System.Data.OracleClient
class db
OracleConnection conns = null
public static void conn(string dbalias, string userid, string password){
try
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public static void ExecuteCommand(string sqlquery)
try
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cmd.ExecuteNonQuery();
NOW the problem is that inseration in oracle database is very slow please tell me how to solve this issue

using System.Data.OracleClient ????
This is the ODP.NET forum.
using Oracle.DataAccess.Client;
and reference something like: C:\Oracle\product\11.1.0\client_1\ODP.NET\bin\2.x\Oracle.DataAccess.dll
Assuming your "insert thread" is simply waiting on the next queue entry, why don't you just turn pooling off, open the connection and keep that one connection open?
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r,
dennis

Query can run in Oracle 10g but very slow in 11g

Hi,
We've just migrated to Oracle 11g and we noticed that some of our view are very slow (it takes seconds in 10g and takes 30 minutes in 11g), and the tables are using the local table.
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This is our query:
SELECT
A.wellbore
,a.depth center
,d.MD maxbc
,d.XDELT xbc
,d.YDELT ybc
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Thanks I will move to the correct one..
Rafi,
Build the Indexes and it is still slow. I am querying from a view from another database, which is in 10g instances.
Moved: Query can run in Oracle 10g but very slow in 11g
Edited by: 924400 on Apr 1, 2012 6:03 PM
Edited by: 924400 on Apr 1, 2012 6:26 PM

When i start my hot backup my database getting very slow

Hi,
I am using following commands for enabling hot backup
SQL>ALTER SYSTEM ARCHIVE LOG CURRENT;
SQL>ARCHIVE LOG LIST;
SQL >ALTER DABATBASE BEGIN BACKUP;
Database altered.
SQL>SELECT FILE#,STATUS FROM V$BACKUP;
FILE# STATUS
1 ACTIVE
2 ACTIVE
3 ACTIVE
4 ACTIVE
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How to improve performance ...
Regards
Vignesh C

Uwe Hesse wrote:
It is very likely that you experience slow performance with ALTER DATABASE BEGIN BACKUP , because until you do ALTER DATABASE END BACKUP , every modified block is additionally written into the online logfiles . Doesn't that happen only the first time the block is modified?
>
The command was introduced for split mirror backups, when this period is very short. Else ALTER TABLESPACE ... BEGIN/END BACKUP for every tablespace one at a time reduces the amount of additional redo during non-RMAN Hot Backup. There appear to be only 4 files. We don't know how big or sparse they are.
>
RMAN doesn't need that at all - much less redo - and also archive - generation then.
Furthermore, you can use BACKUP AS COMPRESSED BACKUPSET DATABASE to decrease the size of the backup even more - if space is an issue.
In short: Use RMAN :-)
Agree with that! Unless the copy is actually going to an NFS mount or something, where I would be concerned whether it is the type of NFS that Oracle likes. I'd also advise a current patch set, as the OP didn't tell us the exact version, and I have this nagging unfocused memory of some compression problems of the "oh, I can't recover" variety.
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WebDav suddenly very slow

Today, WebDav became suddenly very slow on my iMac running the latest version of Mavericks. Yesterday everything was OK.
When I try WebDav from my iPad things are OK, so I suspect something is wrong on my iMac. I already tried rebooting and resetting PRAM and VRAM.
Does anyone have a good suggestion?

Hello,
Check to see how much free disk space there is. Right or control click the MacintoshHD icon on your Desktop, then click: Get Info. In the Get Info window, click the discovery triangle so it's facing down. You will see; Capacity and Available Make sure you have 10% available disk space, 15% is better. Insufficient available space, can cause performance issues, system corruption, and possible loss of data.
Check the hard disk for errors.
Insert Installer disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu (Panther and earlier) or Utilities menu (Tiger and later) and launch Disk Utility.
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)
Click Repair Disk on the bottom right.
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If DU reports errors Repair again and again until DU reports disk is repaired.
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Mac Book Pro suddenly very slow

MacBook Pro suddenly very slow despite good wifi connection. Should I be scanning for virus? and if so, which product?

Scanning for a virus will be a waste of time. To date there are no know virus' affecting Macs.
More details might be helpful, but in the interim, look at this comprehensive document:
https://discussions.apple.com/docs/DOC-3521
Ciao.

My Mac Book Pro is suddenly very slow. Suggestions?

My Mac Book Pro is suddenly very slow. Suggestions?

Hi p,
Try any of the following which you have not yet done:
Make sure you have at least 15% free space available on your HD.
Check SMART status on HD.
Repair Permissions.
Repair Disk.
SMC Reset.
Safe Boot.
Check Page outs in Activity Monitor.

Database performing Very slow - Lots of wait events

My database is on Oracle10g on Sun 5.10
The users are complaining about database is very slow.
I analyzed the indexes & later on rebuild them, hardly it has only 5% performance improvement.
http://i812.photobucket.com/albums/zz43/sadeel00/untitled1.jpg
http://i812.photobucket.com/albums/zz43/sadeel00/untitled2.jpg
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Duplicate post - Database performing Very slow - Lots of wait events
Srini

Help!My MBP is suddenly very slow with frequent loading icon

Was working perfectly Sunday then woke up on Monday and it was suddenly very slow and almost every task prompts the spinning loading icon. Tried a software update, but didn't solve anything. Below is my etrecheck please reply with any suggestions!
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Hey paoloac,
Thanks for the question. I understand that you are experiencing issues with your MacBook. The following resource may provide a solution:
OS X Mountain Lion: If your Mac runs slowly
http://support.apple.com/kb/PH10798
Thanks,
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Database is very slow

Hi Guys,
I am geting trouble. My database is very slow. I couldn't log in when I launch enterprise manager. I use sqlplus to login on as sys, and it was ok, but it was very slow when I select from v$lock. It is fast when I select from v$session. How can I fix? How can know what database is doing? Thanks.

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data block 4234 1259059
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A user connect to the database is very slow.

Hi, all!
I met a problem in the database. A user(schema) connect to the database is very slow. and the user query the data is slow too.

And some errors in the listener.log :
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Oracle connection is very slow

Hello,
I install oracle enterprise 5 and oracle 11g R2 and when i connect oracle from plsql developer connectoion is very very slow.
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Hi,
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davidwh1,
I may have misread your original post... but I interpreted your message to say that you have your information on a laptop, and that the laptop and AppleTV are both connected wirelessly to your router. And if that is the case you can connect your laptop directly to your AppleTV for testing purposes. However, if your iTunes is on your desktop PC, perhaps you could try to sync one of your laptops (if you have iTunes on it) to your AppleTV in order to rule out that it is a connection issue. Sorry if I misread your post and I wish you good luck.
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(aka Bannon)

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