Number of oracle connection increase

We added more web servers IIS Servers which connects to Oracle Database. Each Server has predefined connection pool. As result of this I see Oracle connections number almost doubled. Here is my question. Could this also impact Database performance somehow down in road. Like memory or CPU utilization. Most of new session sitting idle.
Oracle Database 9.2

Each connection to database will have a server process (shadow process) running for it on DB server if using dedicated connection method.
These server process will take about 1M memory initially, could grow depends on what's running. So make sure you have enough memory to accommodate them and check your DB parameter
processes and sessions, they govern how many concurrent connections can be opened to database.

Similar Messages

As a number of Oracle Connections created - Performance Issue

Hello,
We are using Oracle 9i as a backend and VB 6.0 as Frontend. For one client one connection will be opened in the Database Server, if 200 clients open the application then 200 connections will be opened in the Database Server, due to that performance issue is raising.
We are doing: If the frontend application is not in use for 10-minutes then the connection is closed and at the same time front-end application is also terminated or if the Client terminates the application the connection is closed in the Server.
Eventhought if 200-Clients connect the Server only 4 to 5 Clients send a request to the Server for retriving or for saving the data.
I want to Open a fixed number of connections in the DataBase Server eg., around 10-connections, and i want to use this 10 connections for 200 clients.
At First 10 Connections are opened and 10 Clients are using this 10 connections, among 10 Clients 1 released the database connection after finishing the Job and if 11'th Client opens then this released connection as to be used without opening a new connection, in the same way if some of the connections from 9 get free and if any other clients open application then this connections which are free as to be used for opening the application or else for doing any transaction. So, that the number of connection to be create can be redused.
Please give me the suggestion how to make use the released connection for doing the transaction or else for opening the application.
Thanking U with Regards,
Sravan,
Hyderabad.

As Satish mentioned, Shared Server can be a good solution, but it would also be worth telling us , how did you quantify this thing that due to the number of connections, you have a performance issue? 200 is not that big number I guess. What's the o/s , exact database version and the system details with database details? Also if you have statspack report, post that too over here.
HTH
Aman....

Oracle 10g Express Edition - number of simultaneous connections

Goodmorning,
I'm goingo to test Oracle 10g Express Edition but I ned to know the max numbers of simultaneous connections it supports.
Many thanks to all.

Hi,
>>Can you tel me how to increase this number in oracle 10g express???
Just modifying the processes parameter is sufficient. The sessions parameter will be adjusted automatically.
SQL> alter system set processes=200 scope=spfile;
SQL> shutdown immediate
SQL> startupFor more information, take a look at this [url http://forums.oracle.com/forums/thread.jspa?messageID=1672879&#1672879]thread
Cheers
Legatti

Huge number of idle connections from loopback ip on oracle RAC node

Hi,
We have a 2node 11gR2(11.2.0.3) oracle RAC node. We are seeing huge number of idle connection(more than 5000 in each node) on both the nodes and increasing day by day. All the idle connections are from VIP and loopback address(127.0.0.1.47971 )
netstat -an |grep -i idle|more
127.0.0.1.47971 Idle
any insight will be helpful.
The server is suffering memory issues occasionally (once in a month).
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
Thanks

user12959884 wrote:
Hi,
We have a 2node 11gR2(11.2.0.3) oracle RAC node. We are seeing huge number of idle connection(more than 5000 in each node) on both the nodes and increasing day by day. All the idle connections are from VIP and loopback address(127.0.0.1.47971 )
netstat -an |grep -i idle|more
127.0.0.1.47971 Idle
any insight will be helpful.
The server is suffering memory issues occasionally (once in a month).
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
Thankswe can not control what occurs on your DB Server.
How do I ask a question on the forums?
SQL and PL/SQL FAQ
post results from following SQL
SELECT * FROM V$VERSION;

How to find the number of ODBC connections to Oracle Database

Hi All,
How to find the number of ODBC connections and all connections to the Database in last week. Are there any views to get this information?
Thanks in advance,
Mahi

What Ed said is true that Oracle doesn't note which type of protocol is connecting to the database, however, you can see which program is accessing the database.
For example: if you already know of a user using ODBC, you can verify as:
select username, osuser, terminal, program from v$session where username = 'SCOTT'
USERNAME                 OSUSER          TERMINAL   PROGRAM
SCOTT                    IUSR_SRV231     SRV231     w3wp.exe
SCOTT                    IUSR_SRV231     SRV231     w3wp.exe
2 rows selected.Assuming that you can confirm the progam noted in the above (example) is the one using ODBC, then you can change the query such as:
SQL> select username, osuser, terminal, program from v$session where program = 'w3wp.exe';
USERNAME                 OSUSER          TERMINAL   PROGRAM
SCOTT                    IUSR_SRV231     SRV231     w3wp.exe
SCOTT                    IUSR_SRV231     SRV231     w3wp.exe
2 rows selected.Just for kicks, I checked our listener.log file, but there was no reference of odbc in it either.
Hope this helps...

Why do the number of active JMS connections increase?

Problem
- Number of active JMS connections and current JMS messages increases until the Weblogic instances crash with an OutOfMemory exception
Setup
- Weblogic v9.2.3, Cluster with 4 Nodes
- A JMS Message is sent from a MDB in Weblogic to a distributed queue which has a member on each of the 4 Weblogic nodes. The session is created as follows session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE), the message delivery mode is set programmatically to persistent and the delivery mode override of the queue setup is set to persistent too
- Standalone JMS client processes: each one is attached to all 4 nodes. Each one uses a unique JMS message selector so that we have more than one queue consumer for one queue but every message is exactly dedicated to one queue consumer. We us weblogic.jar for the clients.
- Use of Weblogic auto reconnect feature. JMS client code:
Connection connection = this.connectionFactory.createQueueConnection();
final WLConnection wlconnection = (WLConnection)connection;
wlconnection.setReconnectPolicy(JMSConstants.RECONNECT_POLICY_ALL);
wlconnection.setTotalReconnectPeriodMillis(-1);
wlconnection.setReconnectBlockingMillis(-1);
Remarks and Questions
- There are no pending JMS messages which is good
- In our setup, each JMS client is connected to all 4 nodes as the messages are not distributed to all nodes: if a message is put to Queue A but the client is only connected to Queue B, the message is NOT transfered from Queue A to Queue B. We set the parameter "Forward Delay" to 5 seconds with no effects. Is this the normal behavior?
- Not all JMS clients are visible in the Weblogic console under JMS Services -> JMS Servers -> [Server] -> Monitoring -> Active Connections. Which one are visible? Which one are not visible? There are also clients where the number of connections is not zero but stays constant; we know that as several independent clients on different hosts are started and the IP adress is visible in the Weblogic console. Why....?
- What reasons can lead to increasing connections? Is this due to client or server problems? Do we have to acknowledge the message in the onMessage(Message) method of the client JMS consumer? So far as I know, we don't have to.
- Are the increasing number of current messages due to the increasing number of JMS connections?
- May the RECONNECT_POLICY_ALL policy produce this problem?
Any hint is appreciated.
Peter
Edited by: pkeller on 23.10.2008 17:08

To answer the question about the forwarding of messages from one queue to another myself: As mentioned at http://forums.bea.com/thread.jspa?threadID=400000611, the forwarding for queues does only work if all queue consumers are attached to the same queue. This means that our setup is OK.
But the main question is still unanswered: why do the number of active JMS connections increase? I forgot to mention that
- all messages arrive at the clients and that no exceptions are visible in the log
- if you kill the client, the connections are still visible in the Weblogic console!?
Please help as this problem is very urgent.
Peter
Edited by: pkeller on 24.10.2008 09:06
Edited by: pkeller on 24.10.2008 09:10

Monitoring total number of JDBC connections

We have our application deployed in the Oracle 10g Application server, it uses Toplink 10g for the Persistence and OR mapping and the Oracle 9i database for data storage, the database connection pool is built and maintained by Toplink.
We observed that on the administration screen for each container, there are 2 parameters, number of active database connections and the total number of JDBC connections.
We did some load testing for the application and observed the following behaviour on the container.
1. When the number of parallel users are 10, behaviour seems to be normal, the active database connections are less than 20(used by the connection pool built by Toplink) and the total number of JDBC connections is the same as the number of database connections.
2. When the number of parallel users is increased to 50, we see that the active database connections is still less than 20, but the total number of JDBC connections just blowed up to 4000+ in less than 2 minutes and still growing. We have no valid explanation for this behaviour as the active sessions is still less than 20. Also we see no obnormal behaviour in our application log files.
The questions i have are
1. What could be the reason for the above abnormal behaviour?
2. How this parameter "Total number of JDBC connections" for a container is actually measured?
3. DOes this parameter gets affected by how we run the database i.e. in Dedicated server mode or Despactcher mode?
Many thanks for any information on this topic..

Perhaps your connection inactivity timeout is slightly too low, so that your connections are being closed and reopened at almost the same frequency. Try increasing the timeout.
Good Luck,
Chris

HELP!!! Max number of Peoplesoft connections

Hi all:
We are using Peoplesoft on Oracle (HP -UX platform). We are in the middle of adding two more Peoplesoft modules this week. As we expect the number of users to increase 3 times (almost 1200 users, concurrently around 200- 250 users), I am wondering if I need to change any Oacle parameters to handle all those connections.
I am worried when Peoplesoft spawns all those SYSADM connections (200-250) to Oracle, if Oracle will slow down - I am still looking for documentation to guide me in setting Oracle parameters for Peoplesoft.
Any help would be greatly appreciated.

Just a question, I haven't aware of peoplesoft module and it behaviour, dont peoplesoft uses connection pooling instead of single session for every connection?
Well, do you think of shared server or not?
You may need to have sufficient value for sessions parameter and also max users connection kernal parameter from HP-UX.
Well, having good pga_aggregate_target also helps in perofrmance.
Jaffar

How to find the number of users connected to database from OS level(Linux)

Hi All,
Could anyone know , how to find the number of users connected to database without connecting with sql*plus
is there any command to find it?
example we have 10 databases in one server, how to find the number of users connected to particular database without connecting to database(v$session)?
oracle version:- 10g,11g
Operating System:- OEL4/OEL5/AIX/Solaris
any help will be appreciated.
Thanks in advance.
Thank you.
Regards,
Rajesh.

Excellent.
Tested, works as long as you set the ORACLE_SID first ( to change databases )
ps -ef | grep $ORACLE_SID | grep "LOCAL=NO" | awk '{print $2}' | wc -l
Thanks!
select OSUSER
from V$SESSION
where AUDSID = SYS_CONTEXT('userenv','sessionid')
and rownum=1;Best Regards
mseberg

Oracle Connection Manager

Hi,
i'm having a problem configuring Oracle Connection Manager. It does start the instance of connection manager
Summary of my environment is
10g Application server and infrastructure machine OS: Windows 2003
9i Database Server: Windows 2003
Client : Java Applet
JDBC driver type : THIN
Installed: 10g Infra first and then 10g midiier(portal and wireless) in seperate oracle homes on the same machine. Eveything is up and running as i was able to login seperately in infra and midtier enterprise managers.
Final Goal : Trying to connect to an Oracle 9i database on a differnt machine than the appserver using an applet, thin drivers and Oracle Connection Manager
Problem : Connection manager instance not started however cmanADMIn service started.
CMCTL:CMAN_oracle9-app> administer cmanOracleAS
Current instance cmanOracleAS is not yet started
Connections refer to (address=(protocol=tcp)(host=10.10.1.101)(port=1610)).
The command completed successfully.
CMCTL:cmanOracleAS> startup
Service Oracleoracle_infraCMAdmincmanOracleAS already running.
TNS-04012: Unable to start Oracle Connection Manager instance.
CMCTL:cmanOracleAS>
Steps done to configure Oracle Connection manager
1. Copied 4 .exe (CMADMIN, CMCTL,CMGW,CMMIGR) files to bin folder of Appserver or midtier's main ORACLE_HOME/BIN folder.
2) created a cman.ora file and copied in appservers /NETWORK/ADMIN directory
3) On cammand prompt type CMCTL...ADMINISTER cman_OracleAS where cman_OracleAS is the name of cman instance used in cman.ora file.
My cman.ora file is as follows
# Copyright (c) 2001,2002, Oracle Corporation. All rights reserved.
# NAME
# cman.ora
# DESCRIPTION
# Sample CMAN configuration file that the user can modify for their
# own use.
# NOTES
# 1. Change <fqhost> to your fully qualified hostname
# 2. Change <lsnport> to the listening port number
# 3. Change <logdir> and <trcdir> to your log and trace directories
# MODIFIED (MM/DD/YYYY)
# asankrut 10/05/2002 - Added Rule List Specifications
# asankrut 06/11/2002 - Modified to add new parameters; added comments.
# asankrut 12/31/2001 - Creation.
# CMAN Alias
cmanOracleAS =
(configuration=
# Listening address of the cman
(address=(protocol=tcp)(host=appserver_name)(port=1610))
# Configuration parameters of this CMAN
(parameter_list =
# Need authentication for connection?
# Valid values: boolean values for on/off
(aso_authentication_filter=off)
# Connection statistics need to be collected?
# Valid values: boolean values for on/off
(connection_statistics=yes)
# Log files would be created in the directory specified here
(log_directory=D:\GAV\OracleAS10\NETWORK\log)
# Logging would be in done at this level
# Valid values: OFF | USER | ADMIN | SUPPORT
(log_level=ADMIN)
# Maximum number of connections per gateway
# Valid values: Any positive number (Practically limited by few 1000s)
(max_connections=256)
# Idle timeout value in seconds
# Valid values: Any positive number
(idle_timeout=0)
# Inbound connect timeout in seconds
# Valid values: Any positive number
(inbound_connect_timeout=0)
# Session timout in seconds
# Valid values: Any positive number
(session_timeout=0)
# Outbound connect timeout in seconds
# Valid values: Any positive number
(outbound_connect_timeout=0)
# Maximum number of gateways that can be started
# Valid values: Any positive number (Practically limited by
# system resources)
(max_gateway_processes=16)
# Minimum number of gateways that must be present at any time
# Valid values: Any positive number (Practically limited by
# system resources)
# max_gateway_processes > min_gateway_processes
(min_gateway_processes=2)
# Remote administration allowed?
# Valid Values: Boolean values for on/off
(remote_admin=on)
# Trace files would be created in the directory specified here
(trace_directory=D:\GAV\OracleAS10\NETWORK\trace)
# Trace done at this level
# Valid values: OFF | USER | ADMIN | SUPPORT
(trace_level=ADMIN)
# Is timestamp needed with tracing?
# Valid values: Boolean values for on/off
(trace_timestamp=on)
# Length of the trace file in kB
# Valid values: Any positive number (Limited practically)
(trace_filelen=1000)
# No. of trace files to be created when using cyclic tracing
# Valid values: Any positive number
(trace_fileno=1)
# Maximum number of CMCTL sessions that can exist simultaneously
# Valid values: Any positive number
(max_cmctl_sessions=4)
# Event logging: event groups that need to be logged
(event_group=init_and_term,memory_ops)
# Rule list
# Rule Specification:
# src = Source of connection; '*' for 'ANY'
# dst = Destination of connection; '*' for 'ANY'
# srv = Service of connection; '*' for 'ANY'
# act = Action: 'accept', 'reject' or 'drop'
# Action List Specification:
# aut = aso_authentication_filter
# moct = outbound_connect_timeout
# mct = session_timeout
# mit = idle_timeout
# conn_stats = connect_statistics
(rule_list=
(rule=
(src=*)(dst=databaseIP)(srv=*)(act=accept)
(action_list=(aut=off)(moct=0)(mct=0)(mit=0)(conn_stats=on))
(rule=
(src=appserverIP)(dst=127.0.0.1)(srv=cmon)(act=accept)
Please help
Thanks
Atul Jain
[email protected]

Forgot to mention that
cmanOracleAS.log file i.e connection manger log file is as follows.
It says does not currently know of service 'cmon' but i have the rule which
allows cmctl to conect locally with 127.0.0.1 .
TNSLSNR for 32-bit Windows: Version 10.1.0.3.0 - Production on 17-MAR-2005
12:17:53
Copyright (c) 1991, 2004, Oracle. All rights reserved.
System parameter file is D:\GAV\oracle_infra\network\admin\sqlnet.ora
Command-line specified parameter file is D:\GAV\oracle_infra\network\admin\
cman.ora
Log messages written to D:\GAV\OracleAS10\NETWORK\log\cmanoracleas1_924.log
Trace information written to D:\GAV\OracleAS10\NETWORK\trace\
cmanoracleas1_924.trc
Trace level is currently 6
Started with pid=332
Running in PROXY mode
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.10.1.101)
(PORT=1610)))
TIMESTAMP * CONNECT DATA [* PROTOCOL INFO] * EVENT [* SID] * RETURN CODE
17-MAR-2005 12:22:07 * (connect_data=(service_name=cmon)(pid=ctl)) *
(ADDRESS=(PROTOCOL=tcp)(HOST=10.10.1.101)(PORT=4589)) * establish * cmon *
12514
TNS-12514: TNS:listener does not currently know of service requested in
connect descriptor
17-MAR-2005 12:22:10 * (connect_data=(service_name=cmon)(pid=ctl)) *
(ADDRESS=(PROTOCOL=tcp)(HOST=10.10.1.101)(PORT=4596)) * establish * cmon *
12514
TNS-12514: TNS:listener does not currently know of service requested in
connect descriptor
17-MAR-2005 12:23:31 * (connect_data=(service_name=cmon)(pid=ctl)) *
(ADDRESS=(PROTOCOL=tcp)(HOST=10.10.1.101)(PORT=4782)) * establish * cmon *
12514
Thanks
Atul jain

Measure the number of user connected to an Application

Hi,
How can I find the number of users connected to a weblogic application
Can you help me understand how can I measure this parameter for a monitoring purpose?
Thanks in advance,
Nicola Attico

Current Sessions is the current total number of open sessions for each application. Yes, you can use JMX or WLST within a script.
The WebAppComponentRuntimeMBean mbean of your application provides this information through OpenSessionsCurrentCount attribute.
For instance, in WLST enter:
wls:/my_domain/serverRuntime/ApplicationRuntimes/my_application/ComponentRuntimes/my_app> cmo.getOpenSessionsCurrentCount()
For JMX I suggest to you see [http://download.oracle.com/docs/cd/E13222_01/wls/docs91/wlsmbeanref/core/index.html]
Edited by: Betino on 22/10/2009 11:26 AM

RE: (forte-users) Forte not letting go of Oracle connections+ RE: (fort

The bug was just reported yesterday so they might not have it available to
the public for a while. I am guessing this bug has been around since 3.M.?
and its very easy to verify it if its happening in your environment. Also I
have been talking to other user that are not using Oracle (Sybase instead)
who are also seen the same problem. I think this is a problem across all
database because there is some fundamental event or process that is not
taking place to close database connections. But just to be safe verify it
in your test environment before moving to 3.5. To verify if its happening
in your Forte version just create a small application that connects to the
database and run it in debug mode. Log into the database and then stop the
debug session. The connection will still be open. This will also occur
when you use the running man or in a deployed application.
ka
-----Original Message-----
From: Labeaux Schiek [mailto:DHSV017dhs.state.il.us]
Sent: Thursday, March 01, 2001 7:21 AM
To: kamran.aminlendware.com; Forte-userslists.xpedior.com
Subject: RE: (forte-users) Forte not letting go of Oracle connections +
RE: (forte-users) SQL Server Maximum DB Processes already allocated.
Hi Kamran,
I just looked up bug # 54610 in Cyber Support and it is not there yet, so a
question.
In your opinion, does this effect all databases? We are using DB2 and
considering going to 3.5 . Are we going to see the same problems you have
had with Oracle?
-thanks
-labeaux
"Amin, Kamran" <kamran.aminlendware.com> 02/28/01 05:28PM >>>Update on my problem. Well now its everybody's problem. Forte has
conformed the bug. Bug number 54610 for your reference.
thanks to everybody for the help..
ka
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com

The bug was just reported yesterday so they might not have it available to
the public for a while. I am guessing this bug has been around since 3.M.?
and its very easy to verify it if its happening in your environment. Also I
have been talking to other user that are not using Oracle (Sybase instead)
who are also seen the same problem. I think this is a problem across all
database because there is some fundamental event or process that is not
taking place to close database connections. But just to be safe verify it
in your test environment before moving to 3.5. To verify if its happening
in your Forte version just create a small application that connects to the
database and run it in debug mode. Log into the database and then stop the
debug session. The connection will still be open. This will also occur
when you use the running man or in a deployed application.
ka
-----Original Message-----
From: Labeaux Schiek [mailto:DHSV017dhs.state.il.us]
Sent: Thursday, March 01, 2001 7:21 AM
To: kamran.aminlendware.com; Forte-userslists.xpedior.com
Subject: RE: (forte-users) Forte not letting go of Oracle connections +
RE: (forte-users) SQL Server Maximum DB Processes already allocated.
Hi Kamran,
I just looked up bug # 54610 in Cyber Support and it is not there yet, so a
question.
In your opinion, does this effect all databases? We are using DB2 and
considering going to 3.5 . Are we going to see the same problems you have
had with Oracle?
-thanks
-labeaux
"Amin, Kamran" <kamran.aminlendware.com> 02/28/01 05:28PM >>>Update on my problem. Well now its everybody's problem. Forte has
conformed the bug. Bug number 54610 for your reference.
thanks to everybody for the help..
ka
For the archives, go to: http://lists.xpedior.com/forte-users and use
the login: forte and the password: archive. To unsubscribe, send in a new
email the word: 'Unsubscribe' to: forte-users-requestlists.xpedior.com

How to limit the number of TCP connections beeing used concurrently while a page is beeing loaded?

We manufacture industrial small-footprint control modules with embedded web server. The resources of these modules are very limited, especially in RAM. We have problem, that FF opens 15 parallel TCP connections while loading a web page (main html page first, then all icons simultaneously). We can not handle such behavior because of lack of RAM memory needed for TCP buffers.
Question is how to limit the number of concurrent TCP connections the browser will use? We need to do it somehow directly from the page, we can not push our customers to change the general settings of their browsers (they would not understand such things anyway).
Do anyone have any suggestion?

Sorry, one other thought. Many web designers now combine all icons into a single image and use CSS to clip the image so that only the desired portion is displayed. This minimizes the number of required connections and increases the probability that the image can be retrieved from cache.
More info:
* [http://www.w3schools.com/css/css_image_sprites.asp CSS Image Sprites - W3Schools]
* [http://www.alistapart.com/articles/sprites/ A List Apart: Articles: CSS Sprites: Image Slicing’s Kiss of Death]
* [http://coding.smashingmagazine.com/2009/04/27/the-mystery-of-css-sprites-techniques-tools-and-tutorials/ The Mystery Of CSS Sprites: Techniques, Tools And Tutorials | Smashing Coding]
No idea whether this is practical for your application.

DataSource max number of open connections

We are using Oracle 9i AS.
We are using the pre installed emulated data source.
We have specified 30 and 100 as the min and max number of open connections.
We are using BC4J application modules in my application . For each application module we have specified the JDBC data source, so the default connection pooling at the Application Module level is disabled, via doConnectonPooling = true.
The question :
1. When i go into the OC4J Home screen and monitor the Open JDBC connections, why is the number more than the max that i have specified ? My data source is being used , because my app is up and running.
thx.

Chints -- There were a few cases that where max connections was not honored prior to the Oracle9ias v903 release. These issues should be fixed in the Oracle9iAS v903 production release.
Thanks -- Jeff Would there be any difference if we were to use a non Emulated data source..we are using Oracle 9i on the back end
thx!!

Maximum number of concurrent connections using java sockets

How can we find out the maximum number of concurrent connections that can be handled by a pooled connection server?
I have a pooled server which creates a predefined number of handlers. Upon receiving a new request it accepts the connection and sends it to one of the handler.
The solution works well for low number of concurrent connections - < 50 or 100
But as the number increases there seems to be an issue
1. Ignoring request even if i increase the handlers
2. Increase in delay. [I feel that the listening thread is not getting the time slice to go read the socket for new requests]
Any idea as to how i can solve this?
Would an NIO socket help [am using the conventional java.io Serversocket, because my clients may not be non-blocking]??
Any help would be appreciated.
Anp

There is no set maximum, but it is in the thousands on most platforms. I have a production server that handles tens of thousands of connections simultaneously. Most likely you have a bug in your code.

Number of oracle connection increase

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