How many users one EJB server can handle?

How many concurrent users can be served by one EJB server? After which point claster of servers should be created?
I know that it depends on application, but can someone estimate some rough average?
Real numbers from working application are very welcome.

Specify the application server name, people would help if you tell the app server name.

Similar Messages

How many users from an application can connect to a SQL server at a time?

HI,
I need to know , How many users from an application can connect to a SQL server at a time? Do we have any settings for this in SQL server for limiting the users?

This is a difficult question, since it is both technical and legal.
The absolute maximum number of connections is around 32700, but unless your server is very beefy, it will choke long before that. A connection is not a user - an application can have many connections for the same user. Depending on your license
model, you may be legally limited to a certain number of users, but this number is not enforced technially.
Erland Sommarskog, SQL Server MVP, [email protected]

Q: How many Users do you serve w. your OES11-Infrastructure?

Reason for this - at first glance - stupid- question is the following:
We migrated (or Novell forced us to) from our low power (two HL DL360 G3 and 2 DL360 g4 one G5) 6.5 Cluster to a very juicy (6xDL360 G8, tons of proccessors) OES 11 cluster. We serve
approx. 1600 - 1700 Clients. Today everything stopped some of the Cluster Nodes didn't respond. This never happend in our old Cluster!
The reason was or IS by "Enterprise" Design:
DMESG: ipv4: Neighbour table overflow. !!!! Are we the only ones in the (small Novell) World who serves more than 1000 Clients???? WHY is there a limitation in the IP Cluster stack???
Did one EVER tested that. Should we better migrate to M$???
ip neigh show | wc -l --> shows 1021 entrys
sysctl net.ipv4.neigh.default.gc_thresh3
net.ipv4.neigh.default.gc_thresh3 = 1024
Means one cluster Node can handle 1024 connections. What if on one Node runs the DNS server? Only 1020 of 1600 Clients get an answer! Cool enterprise solution boys!
VERY angry!

On 03/25/2014 04:56 AM, jottschi wrote:
>
> Reason for this - at first glance - stupid- question is the following:
> We migrated (or Novell forced us to) from our low power (two HL DL360 G3
> and 2 DL360 g4 one G5) 6.5 Cluster to a very juicy (6xDL360 G8, tons of
> proccessors) OES 11 cluster. We serve
> approx. 1600 - 1700 Clients. Today everything stopped some of the
> Cluster Nodes didn't respond. This never happend in our old Cluster!
> The reason was or IS by "Enterprise" Design:
> DMESG: ipv4: Neighbour table overflow. !!!! Are we the only ones in the
> (small Novell) World who serves more than 1000 Clients???? WHY is there
> a limitation in the IP Cluster stack???
I'm sorry to hear about the lack of availability of the cluster nodes. I
am sure it is frustrating to have a system configured to be
highly-reliable (via clustering) to fail due to default settings. With
that said, this is a default Linux setting, and you're welcome to change it.
> Did one EVER tested that. Should we better migrate to M$???
I do not understand what you're asking.... did anybody test this on large
broadcast domains?
> ip neigh show | wc -l --> shows 1021 entrys
Wow, well that's quite a few. I think this number indicates something you
do not realize, though. While something like 'ss' or 'netstat' will tell
you how many layer three (IP) or four (TCP/UDP) connections your system
has, that number is not reflected by 'ip neigh', so usually the number of
clients your system has is limited in the list of neighbors by quite a
bit. For example, if I make a connection on my laptop (openSUSE, but same
default for my neighboring table) to Google, I can see that I have a fair
number of network connections total as shown:
Code:
me@mybox:~/Desktop> /usr/sbin/ss -planeto | grep -c ESTAB
61
but that's only tangentially related to the number of neighbors my laptop
sees:
Code:
me@mybox:~/Desktop> ip neigh
192.168.1.20 dev eth0 lladdr 00:1d:09:03:54:02 STALE
192.168.1.254 dev eth0 lladdr 00:1e:2a:74:66:35 STALE
192.168.1.1 dev eth0 lladdr f8:8f:ca:40:7a:1c REACHABLE
192.168.255.50 dev br8 lladdr ac:d3:58:ae:8e:ac STALE
How can that be? I have at least eight connections to unique remote
machines, so shouldn't I have at least eight listings in 'ip neigh'
output? The answer, of course, is 'no' because what you see from 'ip
neigh' are the cached addresses found via ARP, and ARP only matters within
the current broadcast domain, meaning on your local network before you hit
any routers. Even though I'm connected out to eight machines, all my
local routing table needs to care about (despite being VPN'd to a few
places and therefore having a few extra networks considered semi-local)
are the server, router, another router, and printer. Also, this number,
as you can see above, has entries become stale pretty quickly. I think
that time period is, again by default, something like thirty seconds,
since there is no guarantee from one second to the next that a given
server, workstation, or other node on the local network will still be
there. After something is stale the system just uses ARP again to see
what's still out there.
> sysctl net.ipv4.neigh.default.gc_thresh3
> net.ipv4.neigh.default.gc_thresh3 = 1024
Yes, this is a default for the Linux kernel in general. You're welcome to
tune it using sysctl, or probably via Yast so that it is stored to be used
after rebooting (and for the nice simple UI, if you're into that kind of
thing).
> Means one cluster Node can handle 1024 connections. What if on one Node
> runs the DNS server? Only 1020 of 1600 Clients get an answer! Cool
> enterprise solution boys!
No, it means that a given box, by default, can handle 1024 connections
from the local network. A typical Class C network, for example, only has
254 possible nodes, so only 253 connections. I've seen enterprises do
some supernetting to get things like 1022 nodes possible in a network, and
sometimes even fill that, but that's it. I have been on networks that had
addresses handed out from a Class B-like range (172.16.x.x) or even a
class A range (10.x.x.x) but those networks never had 65k or 10M boxes on
them because when you get too far beyond a thousand nodes you typically
suffer a bit of slowness. In your case you not only have more than 1024
nodes, but all of them are talking to the same server at the same time on
that same network.
Can Linux handle more? Sure, you're dealing with the same OS that runs
most supercomputers in the world, many of them being large clusters of
computers all working together in a single network, so obviously the
potential is there; however, there are reasons that one does not allow the
kernel to chew up all memory for a setting like "how many neighbors do you
have cached right now" when, for 99.9999% of the world, that max number
is around 200 since this specifically deals with neighbors on the same
segment or broadcast domain, not neighbors meaning anything reachable via
IP. Doing otherwise, for example setting it to 1,000,000, means that
somebody who was clever could more-easily waste your system's memory via a
denial of service (DoS) attack by flooding the network with bogus ARP
entries. Every one takes some memory, and every one needs to be managed
by the kernel until it is expired and removed, and again those networks
needing more than 1024 to be remembered within any single thirty-second
period are pretty rare. Your network must be pretty awesome to handle
that number of concurrent systems in the same logical network without
degradation.
Regarding running a DNS server, that is a good possibility as a service
that would experience this problem assuming all of the clients were on the
same network as the DNS server itself. While possible, the number of
networks where I've seen that has been pretty small overall since usually
those machines (servers) end up in a DMZ somewhere to prevent
unauthorized, or at least unaudited, access.
> VERY angry!
You're right in that this limitation should be documented, and made quite
obvious wherever it is documented. The migration guide would make sense,
as that would be a place where a lot of assumptions about defaults would
be questioned due to the OS change. If you have a specific page in the
documentation where you read through and expected limitations to be called
out, please either submit feedback, perhaps linking to this thread to
provide the background that you experienced, or post a link here an I'll
do the same.
If there are any other defaults that you feel should be changed,
particularly for your environment, sharing those may help as well.
In the meantime, you can change your current settings by running the
following as 'root' if you have not done so already:
Code:
cp /etc/sysctl.conf /etc/sysctl.conf-`date +%s`
cat << EOM >> /etc/sysctl.conf
# Setup higher threshold for arp
net.ipv4.neigh.default.gc_thresh3 = 4096
net.ipv4.neigh.default.gc_thresh2 = 2048
net.ipv4.neigh.default.gc_thresh1 = 1024
EOM
To apply the changes either run 'sysctl -p' (from memory I think that's
the right command) or else reboot the node, then perform again on other nodes.
Good luck.
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How many users for remote connection can I create, from support SAP

Dear all
I have a doubt with how many users can be created in my system ERP 6.0 for the remote connection, for the error product messages on the marketplace SAP,without this counts as user license.
I have not found any notes or documents from SAP to explain this.
I appreciate your help.
Best Regards,
Erika

Ok...I will reply to myself. I can use more than 10 simultaneous connection, using vnc.

How many nas connections to router can handle

Greetings,
I wonder how many NAS Linksys EA6500 in Bridge mode can handle.
I have got two Linksys EA6500 routers - one bridged with already one WD My Cloud connected.
I thank you in advance.

Sorry I thought you were going to use the EA6500 as your NAS.
Having a separate switch for the NAS's is best if you have a lot of Ethernet LAN data otherwise plugging them straight into the router would be fine.
Please remember to Kudo those that help you.
Linksys
Communities Technical Support

Is there a limit to how many Ipods one downloaded song can be loaded on?

I just got an Ipod Nano for Christmas and I'm new to this. Everyone in my family has one now and we want to share our music. If I download a song from Itunes, how many Ipods can I put it on? I'm sure there is a limit, I just needed to know how many.
Thanks!!!
PC Windows XP Pro n/a

Again (sorry for slightly changing the point of this thread!) but out of curiosity....if you change the import encoding rate (like you can in iTunes) in WMP to their closest equivalent of Apple Lossless would that still cause the imported CD to lose more sound quality or would it be the same as it is on the CD? I was curious because the other day I imported a friends CD into my iTunes but right before I did it I switched my importing to Apple Lossless (something I had never used). I did this only because I wanted to burn a copy of the CD since I had lost mine years ago and you can't find it in a store or online to save your life! My assumption was that the sound quality would be the same as opposed to it being how I usually did it (AAC 128). With it being an old CD (13 years old) I didn't really want the quality lowered. I noticed that WMP also has something along the lines of Apple Lossless in their import choices. Again, sorry to turn this thread into an education thread!

How to make one edge server can connect another one

hello everyone
there is a problem with mutilple edge server connection.
i can connect the orgin server with such
URI:"rtmp://edge1/?rtmp://orgin/app"
however,the connection has been rejected when i try to use 2
edge servers before orgin server.and the URI like
this:"rtmp://edge0/?rtmp://edge1/?rtmp://orgin/app"
anybody know why that and how to solove?thank you!
and this is my client code to check the conneciton status
var server="rtmp://edge0/?rtmp://edge1/?rtmp://orgin/app"
var nc=new NetConnection()
nc.onStatus=function(info)
trace(info.code)
nc.connect(server);

Double click the layer icon in the layers panel. Then hit the create mask button at the bottom of the panel (lower red circle). Then with the layer mask selected (upper red circle, notice the black outline shwoing you are working the mask, not the layer), use the gradient tool to make a gradient as shown in the icon preview. Then save for web as PNG24.
<br />
<br />
<a href="http://www.pixentral.com/show.php?picture=1pTgqlM1shye4AuiOINeT6f1833CF0" /></a>
<img alt="Picture hosted by Pixentral" src="http://www.pixentral.com/hosted/1pTgqlM1shye4AuiOINeT6f1833CF0_thumb.gif" border="0" />

How many users can you have on one account ?

Hi,
I have just created a ID with Adobe Reader for a group to use files stored in cloud. I would like to know how many users can access the account at one time via, mobile devices, ipad, desktops ?

I don't know if there is a limit; you do mean the free https://cloud.acrobat.com/ ?
I will move your post to the Acrobat.com forum, where someone hopefully can give you a definitive answer.

How many users can I import at one time?

Is there a limit on how many users I can import at one time?
Also, how about other record types (Lead, Opportunity, Contacts ...etc.) Is there a limit on these also?
Where in the documentation that I can find info for this please?
I'm using CRMOD Release 18
Thanks

Account
30,000
Account Team
50,000
Appointment
30,000
Appointment Contact
50,000
Appointment User
50,000
Asset
80,000
Campaign
50,000
Contact (Admin)
30,000
Contact (Personal)
2,000
Contact Role
50,000
Contact Team
50,000
Lead
30,000
Notes
50,000
Opportunity
30,000
Opportunity Product
80,000
Opportunity Team
50,000
Portfolio
30,000
Product
80,000
Service Request
30,000
Solution
50,000
Task
30,000
Task Contact
50,000
Task User
50,000
User
500
Campaign Recipient
50,000
Custom Objects
30,000
Dealer
80,000
Vehicle
80,000

How many users can connect to a shared drive on a non-server workstation?

How many users can connect to a shared drive on a non-server workstation? We're waiting for our server to arrive and in the interum we're using a Pegasus 2 R6 attached to an iMac running Mavericks as our fileserver. It's been sketchy, the connection to the server being dropped once in a while or the inability to mount the drive after a week of success. The Pegasus we're using now will be attached to a server once it arrives. For now I need to figure what's coausing trouble before I commit to this being our main storage as planned. The data is backed up every night so I'm not worried, its the usability issues. 5-7 people are mounting this drive and opening/saving at the same time. Is there a limit to Maverick's fileserving ability that may be causing this? Understandable if so.

The file server in the client version of OS X has a default limit of 10 simultaneous connections. That limit can be raised by installing OS X Server, or lowered by setting a hidden preference. Assuming you've done neither, you may be able to solve the problem temporarily by stopping and restarting file sharing in the Sharing preference pane, or permanently by setting another hidden preference on the server to break idle connections quickly.
defaults write /Library/Preferences/com.apple.AppleFileServer idleDisconnectOnOff -bool YES
Stop and restart file sharing. To reverse the change, run this command in the same way:
defaults write /Library/Preferences/com.apple.AppleFileServer idleDisconnectOnOff -bool NO
Credit for this solution to ASC member suter:
this file server will not allow any additional users to log on

How many users can login to Microsoft SQL Server 2012 standard?

I searched around the forum but didn't find anything specific.
I downloaded Microsoft SQL Server Standard 2012. How many users can login into it?

Hi Texastig,
Welcome to forum. I guess Sean/Vaibhav aptly answered your question can you please mark there reply as answer. An OP does not marks his own comment as answer which actually is thank you comment or unless he himself found an answer
Thanks for understanding
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
My Technet Wiki Article
MVP

How many users can 1 Xserve support?

I have one Xserve (10.5.2, 2x3GHz, 5GB RAM, 1.34TB RAID 5) that I want to support the following services for my SMB:
DNS, DHCP
AFP, NFS, SMB
Open Directory
Print
Software Update
I also want to have mobile sync'd network home folders, but only for ~/Documents and iCals and Address Books (I don't want everyone's MP3s or family photos).
I occasionally will use NetBoot/NetInstall, but only 1-2 users at once.
I am getting ready to migrate my company to OpenDirectory and 10.5.2 for all users and was hoping someone here might be able to tell me how many users I can reasonably support with one Xserve.
Also, is it a bad idea to have everyone using "mobile" accounts? It seems like it would be less strain on the server to have the occasional sync from users than everyone reading & writing all the time. Also, if anything happened, there would be a local copy and a remote copy of any files.
Thanks.

Rosemarie,
BeehiveOnline currently supports 95,000 users and we have groups on the system as large as 10,000, that is probably about as big as we want to go - remember collaborating with 10,000 users is not an effective way of working - maybe a more open way of delivering content may be more appropriate. Given that the only issues we have with very large groups is the time it takes to run and the email traffic it generates as the large group are processed.
So it is possible to host 10,000 in a group but we need to be warned in advance and work with you to minimise the impact as the group is set up.
Phil

How many users/ schemas can we create in an oracle database?

How many users can we create in an oracle database? Or how many users can oracle handle?
Problem-
I have to store information of ontologies (I will use countries instead) in db.
I have to store information regarding countries.
I have 13 tables in all to maintain for each country.
Now there are two approaches:
1) keep only 13 tables. Have an extra column in each table to indicate that a particular
row stores information for which country.
2) create a new user/ schema for each country. So we can get rid of the extra column
needed in 1st approach.
I have used the second approach. This is because number of entries in each table for a
given country will be large.
So initially when the s/w is installed I create a central-user. Each time data for new
country has to be entered central-user creates a user/ schema, and creates tables for
this user/ schema. The central user can access the tables of all the countries by
country_name.table_name. By this approach I believe searching would be easy.
If there is any flaw in my approach kindly mention it.
Thank you

There is no (practical at least) limit to the number of users & schemas you can have in Oracle.
Your approach, however, is not going to scale nearly as well as the first option you outlined (adding a column). You are going to end up caching every possible variation of the various queries you're going to be executing because you will be referring to so many different tables, which is going to mean that you are doing a lot more work to parsing statements and generally churning through the shared pool. If you create enough users, you're liable to start hitting ORA-04030 errors because your shared pool is so fragmented.
Additionally, you're likely going to end up with a whole lot of dynamically generated SQL to accommodate new schemas getting added over time which is going to cause you even more pain. Figuring out dynamically what table to join in is a heck of a lot more difficult for the programmer to write and for the database to handle than simply passing in a different country code.
If you're concerned about having too much data, you can have your cake and eat it to by adding the country column and partitioning the tables based on country.
Justin
One other item I forgot to mention is maintainability. Having dozens or hundreds of "identical" schemas makes maintenance a huge pain because something like adding a new column now requires dozens or hundreds of separate DDL statements. You're almost guaranteed that some schema isn't going to be in sync-- it's going to miss a column or miss an index, etc.
Message was edited by:
Justin Cave

How far will the extreme reach and how many users can be on there at the same time?

How far will the airport extreme reach and how many users can be on there at the same time?

Last question first, since that is the easy one......approximately 50 (fifty) users for wireless depending on how active each user might be.
The first question is much more difficult, as distance is not really the issue with wireless.....obstructions are the issue.
A wireless signal can easily travel 300 feet or more with no obstructions in the signal path.
But, a typical wall of sheetrock or wallboard in a home will absorb....on average....15-20% of the wireless signal. Brick or adobe will obviously absorb much more. A ceiling....because it is thicker....will absorb about 25-35% of the signal.
So, if the wireless signal must pass through several walls and a ceiling, there won't be much, if any, of the signal left....even though the distance that the signal travels is not great...for example, 20-25 feet.
Other wireless networks around you at the neighbors can also affect the relative strength of the wireless signal.
The bottom line....locate the AirPort Extreme where wireless devices will receive a signal with the least amount of obstructions in the signal path. Your actual performance cannot be predicted in advance. You will not know how well the AirPort Extreme works for you until you try it out in your home.
If you find that the signal does not reach as far as needed, you will need to add additional "extenders", like an AirPort Express to provide more signal coverage.

How many Users online at any one time?

Is there any better (/more accurate) way of determining how many users are using Planning at any one time then "Administration >Application>Statistics"?
I've been using the Statistics up until now but it's hardly fit for purpose. The timings look dubious and the same users can be there 20+ times in the same list.
It's not a deal breaker, but would be nice to see if anyone else had any hints on this.
Regards
Ed

Even after a reset the numbers look very weird. Apparently it's been 6 weeks since I last accessed Planning... I should be fired!
Slightly off topic: My Supporting Detail Detection Cache Usage is at 100%, am I right in thinking I should DECREASE the cache size in the Application Properties as per the Documentation (http://download.oracle.com/docs/cd/E17236_01/epm.1112/hp_admin.pdf - P83)?
Sounds wrong to me.
Any ideas anyone?

How many users one EJB server can handle?

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