How many applications can I run simultaneously?

I just bought a new MacBook Air after owning a white Macbook for the last four years. I used to push that pretty hard, but I feel I'm still habituated towards quitting applications when I'm done with them, rather than keeping everything open.
With the new MacBook I have two user accounts that I'm constantly switching back and forth between, and I run something like ten apps in each. Mail, iChat, Reeder, Safari, iWork, Skype, Twitter, iCal, iTunes, Grapher, and software called TestGen which I use to make worksheets and tests for my students is in my user account for work, and Mail, Ichat, Reeder, Skype, Twitter, iCal, iTunes, and Safari in my personal account. On the Macbook I used to quit out of the account before logging into another one, but so far the Air seems to handle both being logged in at the same time. Is this level of usage fairly normal?
If most of the apps are in the background most of the time and none of them are particularly processor heavy, will this level of usage have a drastic negative effect on battery life?

Idle applications reside in RAM and should not impact on battery life.
Each users' environment and useage varies.
Only you can answer your own question by seeing how long your battery goes.

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How many databases can be opened simultaneously in a single file?

To all:
I don't known how many databases can be opened simultaneously in a single file. After my application open 499 databases in a single file simultaneously, DB->open return error 12.(can not allocate memory ?).
How can i do ? Thanks.

I found it:
Berkeley DB Reference Guide:
Locking Subsystem
PrevRefNext
Configuring locking: sizing the system
The lock system is sized using the following three methods:
DB_ENV->set_lk_max_locks
DB_ENV->set_lk_max_lockers
DB_ENV->set_lk_max_objects
The DB_ENV->set_lk_max_locks, DB_ENV->set_lk_max_lockers, and DB_ENV->set_lk_max_objects methods specify the maximum number of locks, lockers, and locked objects supported by the lock subsystem, respectively. The maximum number of locks is the number of locks that can be simultaneously requested in the system. The maximum number of lockers is the number of lockers that can simultaneously request locks in the system. The maximum number of lock objects is the number of objects that can simultaneously be locked in the system. Selecting appropriate values requires an understanding of your application and its databases. If the values are too small, requests for locks in an application will fail. If the values are too large, the locking subsystem will consume more resources than is necessary. It is better to err in the direction of allocating too many locks, lockers, and objects because increasing the number of locks does not require large amounts of additional resources. The default values are 1000 of each type of object.
When configuring a Berkeley DB Concurrent Data Store application, the number of lock objects needed is two per open database (one for the database lock, and one for the cursor lock when the DB_CDB_ALLDB option is not specified). The number of locks needed is one per open database handle plus one per simultaneous cursor or non-cursor operation.
Configuring a Berkeley DB Transactional Data Store application is more complicated. The recommended algorithm for selecting the maximum number of locks, lockers, and lock objects is to run the application under stressful conditions and then review the lock system's statistics to determine the maximum number of locks, lockers, and lock objects that were used. Then, double these values for safety. However, in some large applications, finer granularity of control is necessary in order to minimize the size of the Lock subsystem.
The maximum number of lockers can be estimated as follows:
* If the database environment is using transactions, the maximum number of lockers can be estimated by adding the number of simultaneously active non-transactional cursors open database handles to the number of simultaneously active transactions and child transactions (where a child transaction is active until it commits or aborts, not until its parent commits or aborts).
* If the database environment is not using transactions, the maximum number of lockers can be estimated by adding the number of simultaneously active non-transactional cursors and open database handles to the number of simultaneous non-cursor operations.
The maximum number of lock objects needed for a single database operation can be estimated as follows:
* For Btree and Recno access methods, you will need one lock object per level of the database tree, at a minimum. (Unless keys are quite large with respect to the page size, neither Recno nor Btree database trees should ever be deeper than five levels.) Then, you will need one lock object for each leaf page of the database tree that will be simultaneously accessed.
* For the Queue access method, you will need one lock object per record that is simultaneously accessed. To this, add one lock object per page that will be simultaneously accessed. (Because the Queue access method uses fixed-length records and the database page size is known, it is possible to calculate the number of pages -- and, therefore, the lock objects -- required.) Deleted records skipped by a DB_NEXT or DB_PREV operation do not require a separate lock object. Further, if your application is using transactions, no database operation will ever use more than three lock objects at any time.
* For the Hash access method, you only need a single lock object.
For all access methods, you should then add an additional lock object per database for the database's metadata page.
Note that transactions accumulate locks over the transaction lifetime, and the lock objects required by a single transaction is the total lock objects required by all of the database operations in the transaction. However, a database page (or record, in the case of the Queue access method), that is accessed multiple times within a transaction only requires a single lock object for the entire transaction.
The maximum number of locks required by an application cannot be easily estimated. It is possible to calculate a maximum number of locks by multiplying the maximum number of lockers, times the maximum number of lock objects, times two (two for the two possible lock modes for each object, read and write). However, this is a pessimal value, and real applications are unlikely to actually need that many locks. Reviewing the Lock subsystem statistics is the best way to determine this value.
I created DB_CONFIG file, and add three lines:
set_lk_max_locks 20000
set_lk_max_lockers 20000
set_lk_max_objects 20000
As the default values are 1000 of each type of object, my applicaton open 499 database(except internal database) simultaneously(CDB modal) . After changed parameters, my application opend above 6000 database.

How many threads can be running at the same time

Hi!!
Dows anyone knows how many Threads can be running at the same time in the JVM.
I'm making a multi thread client-server app and I would like to know how much simultneous connections the JVM support. I'm using one Thread per connection.

Hi, thanks to all for your answers.
I think that I made the wrong question, as you said: "that means the number of threads currently created".
I'm worry about this because my application is already online (It's a mail server -SMTP and POP3 server using ORACLE for the users database- ) and some other user post in the "multi-tread forum" that almost any JVM can only have 700 threads created at the same time, and I've never heard or read anything about this.
what you mean with the stack space (memory??)
I'm using the JavaWebServer 2.0 and a servlet to start the main Thread.
Again Thanks to all for the answers but I think that the schapel answer is the one that solve my doubt...

How many times can I run PSConfig.exe -cmd upgrad .... command

I'm getting VSS error in my eventlog -> application. I was getting 8213 and followed http://technet.microsoft.com/en-us/library/cc734219(v=ws.10).aspx and
now I'm gettting 8230.
Meanwhile my backups not are running. I remember running PSConfig command when I first installed windows and sharepoint 2010 on this box for system backup to work correctly.
Now I run WMIC QFE LIST FULL /Format:HTable > C:\Temp\HotfixList.html to retrieve all the installed update to check if KBs
2460045 or 2687453 are installed unnoticed but I don't have any history of installed updates suprising eh!
Now I want to run
PSConfig.exe -cmd upgrade -inplace b2b -force -cmd applicationcontent
-install -cmd installfeatures
just incase one of them have been installed unnotice.
How many times can I run this PSConfig command? How dangerous is this decision?

You can run it as many times as you want, but it will take SharePoint down on that particular server (resets IIS, for example), while it executes.
Trevor Seward
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This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

How many devices can i run lion on it?

how many devices can i run lion on it?

As far as licensing goes, it seems that as long as all the Macs are being used in your household, there's no limit.
From the Lion license file:
"If you obtained a license for the Apple Software from the Mac App Store, then subject to the terms and conditions of this License and as permitted by the Mac App Store Usage Rules set forth in the App Store Terms and Conditions (http://www.apple.com/legal/itunes/ww/) (“Usage Rules”), you are granted a limited, non-transferable, non-exclusive license:
i) to download, install, use and run for personal, non-commercial use, one (1) copy of the Apple Software directly on each Apple-branded computer running Mac OS X Snow Leopard or Mac OS X Snow Leopard Server (“Mac Computer”) that you own or control."

How many vpn can be used simultaneously in Azure?

I need to add multiple locations to my azure platform approximately 90 branches , I need to know if I should set up a vpn for each branch , or as I should. thank you very much .
I am from Colombia , if they can write in Spanish would be better

Hi,
It seems that you have asked this question before:
https://social.msdn.microsoft.com/Forums/azure/en-US/c533ff85-c155-4a19-8156-67901da66ee4/how-many-vpn-can-be-used-simultaneously-in-azure?forum=WAVirtualMachinesVirtualNetwork#c533ff85-c155-4a19-8156-67901da66ee4
Based on my experience, the maximum limitation for virtual networks and local networks is 100 per subscription and the limitation for local network
sites is 10 per virtual network in Azure. If you connect each on-premise branch with an Azure virtual network, it would be possible to do that. However, the default limitation for virtual networks and local networks is 10 per subscription, you can request
an increase limitation by following the article below:
http://azure.microsoft.com/blog/2014/06/04/azure-limits-quotas-increase-requests/
If you have anything unclear, please feel free to let me know.
Best regards,
Susie
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected]

How many monitors can you run?

How many screens can you daisy chain on the MacBook Pro 15" 2013?

Hi barker2405,
Welcome to the Support Communities!
If you have a thunderbolt port on your computer, this article will explain the various configurations for attaching external monitors.
Thunderbolt ports and displays: Frequently asked questions (FAQ)
http://support.apple.com/kb/HT5219#2
Cheers,
- Judy

How many applications can be installed?

I have a medical users that uses Epocrates, Tarascan, Clinical Consult, and Sandoth.
The phone 8330 gets slowed down and I am assuming this is a memory problem. So i need to confirm this so i can recommend a diferrent platform for her if necessary.
How many apps can be loaded in addition to the stock apps?
Thanks.

Hi and Welcome to the Forums!
Sorry, but there really is no number that can be given in answer. It is a function of the size of the apps that are installed...larger apps will result in fewer total being able to be installed. Smaller apps will result in a larger quantity. There's no way to say what that number is since it's not fixed. Here's an article that discusses qualifying low memory situations:
http://www.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB15345&sliceId=SAL_Pub...
Perhaps it'll be helpful in your evaluation.
Cheers!
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If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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How many counters can I use simultaneously?

I have cDAQ-9172 and 9411.
From the specification of 9411, there are 6DI channels of 9411.
The NI-DAQmx help say
Note PFI terminals are available when the device is installed in slot 5 or slot 6 of an NI cDAQ-9172 chassis.
So, I don't know whether that means 9172 has 2 counters can be used simultaneously.
My question is 9411 has 6DI channels, it can be used as counters simultaneously?
I have more 2 device generate frequency which need to be acquired.
I hope someone here can help me or give me some hint.
QIA
http://www.vitst.com
Virry Test & Control
LabVIEW Certified Developer
Solved!
Go to Solution.

Hi QIA,
The cDAQ-9172 has 2 counters that can be used simultaneously, and you're correct that installing your NI 9411 in slot 5 or slot 6 will allow you to access those counters. Any of the 6 DI lines on your 9411 can be used to access the inputs to either counter.
I'm not sure if you're saying that you have more than 2 signals to measure frequency on. If that's the case, post a little more info about your application (How often do you need to read the frequency? How many channels?) and we can try to figure out a good solution.
Regards,
Kyle

EastWest Symphonic, LA Scoring Strings - How many instances can you run?

Hi - After investing in a new quod core recently and been really depressed by the performance I'm getting I wondered whether users of EW Symphonic Orchestra and/or LA Scoring Strings, Vienna Symphonic etc... could share with me how many instances they can load and run in a mix.

Hi,
i understand your frustration
Below is a list of the things I had do to to make my system usable:
1. Turn Airport & BlueTooth : OFF
2. Apple System Preferences:
Energy Saver: Set Computer and Hard Drive to: Never Sleep,
Software Updates: Check for update: Uncheck
3. Logic Preferences, Audio , Devices:
I/O Buffer Size 512
Software Monitoring: OFF
Process Buffer Range: Large
Audio Units Manager: Uncheck all AU plugins not being used!
4. Logic Preferences, Audio, General:
Track Mute/solo: CPU-saving(Slow Response)
Sample Accurate Automation : OFF
Plug-In Delay Compensation: OFF
5. Assign ALL tracks thru Buss's, See Link below
http://support.apple.com/kb/HT3161
6. Keep a muted audio track in the arrange page and have it selected
LOgic uses additional CPU power if a midi track is selected
7. Keep at least 50gb or more of free space on the hard drive
8. Run the freeware program Mac Janitor
9. Do not run any other programs during the Logic Session. Close all programs not being used.
10. VERY IMPORTANT! Restart computer to flush ram. Do this each and every time you reload your Logic Sequence.
Also check out this link:
http://www.youtube.com/user/SFLogicNinja#p/a
I hope this helps

How many applications can I download with Creative Cloud?

I recently purchased a Creative Cloud subscription, and want to download programs to both my desktop and laptop. Does a subscription allow for this?

How many different applications you can download depends on both the subscription you signed up for and the machines you intend to install them on. You can have working installations on two different machines.

How many sessions can you run on a single PC?

I have a user who insists that they need to be able to run multiple sessions of MS Dynamics AX 2012. Now they are complaining because they can only run 3 sessions instead of 4.
Is it advisable to run multiple sessions of DAX on a single computer?

Hi,
this forum is about Dynamics CRM, for Dynamics AX post your questions here:
https://community.dynamics.com/ax/f/33.aspx
My blog: www.crmanswers.net -
Rockstar 365 Profile

How many nodes can I run?

Ok, in the (hopefully temporary) abscence of 4-processor G5 support from Apple, I can node my other half of the G5 Quad to itself, but can I also add my Pb 1.25Ghz as a node at the same time?
If so, any ideas how?

Theoretically, you can run as many nodes as you want I guess - But I'd imagine there would become a point where bandwidth is saturated and adding more nodes wouldn't make any difference.
Sure you can add your PB, but I think that only has 100mbps networking capabillity, so performance won't be as good.
Network your two Macs together, preferably via a hub or switch, install the node on your PB and make sure it's running, make sure Logic sees the node, then activate your tracks with the select buttons.
I don't think I've missed anything out.

How many computers can we run our license for LabVIEW at the same time?

We have LabVIEW 8.2 and we need it to operate on several machines at the same time. How can we do this? Can we check to see if our current license allow us to do this?

Are you talking about developing code on multiple machines or just running programs? If you build your applications into an executable you can deploy those to any machine without buying anything else. If you need the full development environment on each machine but will not be doing development on them look for something called a Debug License.
=====================
LabVIEW 2012

How Many Tracks Can be Played Simultaneously??

Hi, I'm trying to play over a 190 tracks simultaneously, but SP will only let me open 126. Is there a way around this, maybe create two files: one with 126 and the rest on another?? Any help would be appreciated.
Thanks!

+Is it an academic question or do you really need that many tracks?+
They don't list a number in the [product specs|http://www.apple.com/finalcutstudio/specs/#soundtrackpro], probably because it would be somewhat system dependent. I can for instance add more than 126 tracks on an Intel iMac, although I'm not trying to playback that many.
I would think that for instance, an 8 core Intel Mac Pro is going to run a lot more than your dual G5.

How many applications can I run simultaneously?

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