We are noticing that IBM MobileFirst Server is using High Memory by Java TM Platform SE binary process, after 2 3 days of server start it reach up to 6 GB which cause the server in hang status, then only restart is the solution.
in logs we found below message:
"No buffer space available (maximum connections reached?): connect"
Enviornment: IBm Worklight Server 7.1 and java version is 1.7 64 bit on windows server 2012. hybrid Mobile application running on this server.
It seems that there might be some configuration required can any one advice ?
Lots of information missing... this can be caused by any number of reasons.
Are you in a cluster? if yes, how many servers? how much memory is available to each machine?
How many adapters do you have deployed? What is the value you gave to the serverSessionTimeout property? This for example can cause connections to stay open for a longer time, meaning the server will not "clean/remove" connections... and the more you have open, the more memory you will require.
all of these and more can contribute to how much memory you may need.
See also: http://www-01.ibm.com/support/docview.wss?uid=swg21690707
It mentions DB2, but the idea is - the more connections, the more memory you will need.
Related
I am using Restcomm smsc gateway 7.3.135. When both client and server were running on same machine, I am getting only 50 tps on single connection.
In the document I have read we can get upto 1000tps. Please guide how can I achieve this.
Thanks
the community edition of restcomm projects is not performance tested, only the product is going through those performance tests as it requires a lot of fine tuning in the project itself, logging, OS, JVM Options, it also depends on the hardware you're running. You should may want to contact Telestax to get help on that as it's usually pretty involved.
I'm using websphere liberty profile v8.5.5.0 and worklight 6.2.
The full version of my WL and runtime is:
Server version: 6.2.0.00.20140922-2259
Project WAR version: 6.2.0.00.20140922-2259
I've noticed that sometimes I have troubles getting into the worklightconsole, the server takes a too big of a time to answer and most of the time it just gives me a time out.
Regarding JVM Heap its at 60 - 70% of the total heap, most likkely 1,5 Gb or something like that.
On the FFDC, sometimes I get a error saying something close to an
FFDC Incident has been created: "javax.naming.ServiceUnavailableException: ldap.example.com:389; socket closed; remaining name 'o=example' com.ibm.ws.wim.adapter.ldap.LdapConnection 1670" at ffdc.log
I have my LDAP connected to this websphere via VPN, and I know that webspheres historically have trouble dealing with LDAP.
However I don't see any more errors on the logs; the machine eventually recovers and is able to work correctly, but for some time is 'down'.
If I enable tracing, the verbosity overwhelms the machine and I can't even start the worklightconsole, neither continue to work with worklight like calling an adapter from an application.
There is one more thing, it seems that this happens more frequently after updates on existing application versions or adapters. Does this ring a bell with anyone?
If i ask for a restart when the machine is sluggish, the stoping of the websphere takes quite some time but eventually stops normally and when I start it, everything is fine right out of the bat.
Before asking for a PMR, I would like to know if there is something else I could do to troubleshoot this problem.
Thanks in advance.
My initial "smell" of the problem is that sometimes your VPN connection with LDAP is very slow or your LDAP server is taking too long to respond.
My suggestion is that you try using WAIT(wait.ibm.com), it's a non-invasive easy to use diagnostic tool, to further investigate. If you find out the call to LDAP is getting hang then I suggest you try tuning Liberty LDAP cache, this should help.
Azure and EC2 are optimized for running servers. Lots and lots of servers. Both platforms attempt to manage tons of things for you -- in Azure's case, it wants to manage even the target operating system.
However, I'd like to use such a service for a different reason: Testing.
I've got a ton of operating systems I need to support. My tests don't actually take that long, but running them on every platform is time consuming. I was going to just use a cloud service for this, thinking that these machines would be running for much less than an hour, and it wouldn't cost all that much.
The problem is that the major cloud services won't run client versions of Windows -- Windows Server only.
Is there a cloud service which would let me run every client and server version, and every service pack level, of Windows released starting with Windows 2000 SP4 to the present day?
Try CloudSigma, Defiantly can upload your own ISO's and run any x86 and 64bit OS you like on it. They have their in-house versions to get started but you can bring your own OS versions.
Based in Switzerland but they would have also the servers in the US, performance i've expected to quite good.
https://www.cloudsigma.com/
There is also a free trail on at the moment
https://cs.cloudsigma.com/accounts/signup/
The list of Open Virtualization Alliance members may have some candidates for you.
A search on the page for "operating system" suggests the following possibilities (in addition to the already-mentioned CloudSigma):
ElasticHosts
stepping stone GmbH (I'm less sure about this one)
Sublime IP
No, commercial cloud services like Azure and Amazon EC2 are themselves virtual, so you don't get a great deal of control over the operating system.
An option may be to consider renting a full physical server (colocated, or managed) and then use a battery of virtual machines to run the tests. Something like VMWare's snapshot feature sounds perfect: spin up a clean virtual machine, deploy the test code, then throw away changes to the disk once the tests have been completed.
Or, indeed, as #Stuart suggests - run the tests locally.
This definitely isn't something Azure offers - I think all of Azure's images are based near to Windows Server 2008 R2.
For EC2 you could set up images for Server 2003 through to 2008R2 - but nothing else. There are also some services out there to assist with this - e.g. VaasNet http://www.vaasnet.com/catalog
For testing the other Windows operating systems, I simply don't think there's a cloud service available to let you do this. I don't even think there are any cloud services where you can run "Virtual PC" type applications on top of the hosted operating system - as I think most of the virtualization APIs are disabled in the cloud environments (virtualization within virtualization not supported!)
Sorry to say this, but your best bet may be local test hardware running VirtualPC images.
It appears that the Xen Cloud Platform might do what you're after. This page ends with:
Guest Operating Systems: the XCP binary distribution is delivered with a wide range of Linux and Widnows guests. Check out the release notes for a complete list.
And their PDF document Xen Cloud Platform Virtual Machine Installation Guide (Release 0.1, Published October 2009) says that Windows 2000 Server has "No known issues."
(I don't have any affiliation with Xen)
In conjunction with the above, there is also a list of Xen VirtualPrivateServerProviders, several of which say they include Windows.
Buy time on an EC2 instance and use it to host VirtualBox VMs with VMs set up for each operating system you want to test for. Use a RDP client or VNC or some other means to control the guest OS. This forum post seems to point to that being possible. But yes it is not a cloud service itself and you would have todo some initial setup and configuration work yourself.
This afternoon, I used python script to test the performance of Redis on Windows.
It worked normally when the number of threads was only 10, but some exceptions occured when the number of threads reached 100.
Exception message:
3 [main] redis-server 1448
_cygtls::handle_exceptions: Exception: STATUS_A CCESS_VIOLATION 1394 [main]
redis-server 1448 open_stackdumpfile:
Dumping stack trace to redi
s-server.exe.stackdump
Is Redis stable on Windows?
Redis is not officially supported on Windows. Some unofficial ports exist (such as the one you're using), but I believe stability is not guaranteed for these ports.
Redis prime dev Salvatore Sanfilippo ('antirez'), December 2011:
I don't think Redis running under win32 is a very important feature. It is cool to have a win32 port that can be used for testing, as we had before, and as we have in a different implementation thanks to the Microsoft patch, so developers using Windows can easily test Redis and develop their projects. But what is the point in providing a production quality win32 port?
Regardless, parties within Microsoft are still improving the Windows build
Here’s to the first release from MS Open Tech: Redis on Windows
Claudio Caldato 26 Apr 2012 12:01 PM 8
We consider this not to be production ready code, but a solid code base to be shared with the community to solicit feedback: as such, while we pursue stabilization, we are keeping the older version as default/stable on the GitHub repository. To try out the new code, please go to the bksavecow branch.
The Redis download page now says "The Redis project does not directly support win32/win64, however we look at interest to projects trying to make a win32/win64 port that is separated from the main project...Currently both ports are not production quality but can be used for development purposes..."
We maintain a stable and production ready Windows port (native!) of Redis.
The Developer Edition is free.
Check out Memurai.
see:
Redis on Windows stable and reliable
I use it in my projects till last month and didn't experience any problems yet.
I'm thinking of getting my own dedicated server with the following stats:
Processor: Celeron 440 2.0 GHz
Memory: 1 GB
Primary Hard Drive : 160 GB SATA II
This will be running Windows. I have some experience with my local IIS and playing around with servers, but I have never set one up (at least a Windows one) and I've never dealt with DNS/backup/security issues.
My question has two parts:
Will this server be able to run Windows 2008, SQL Server, and possible Exchange on it without trouble. I'm worried about the processor and RAM.
Are there any guides/tutorials that talk about how to admin a windows server from start to finish. (I'm looking for something like the FAQs slicehost has for *nix based servers).
You WILL run into a problems with RAM. Refer to MS documentation and minimum requirements (SQL Server and Exchange). Also please mind that new releases of Exchange run only on 64bit systems.
Personally I would recommend installing CORE version of W2K8 if you plan to go with your described configuration.
It depends from user load. If you have about 1k unique users / month this means that probably, you will have 30 users per day - roughly 1 per hour. I think you will use more CPU working on this computer personally. So it really depends from user load.
If I were you, I would add more RAM to have something about 4 GB. RAM is the cheapest upgrade available.
You state "I've never dealt with DNS/backup/security issues."
I would suggest to you that these are the most important issues. You need to stay on top of security, applying security patches, insuring firewalls are properly configured etc.
Having been called after the fact for websites that have been hacked, I can tell you it is not pretty. Learn all you can before you stand up this server on the internet.