JMS Server Message Buffer Size & Thresholds and Quotas settings

On WLS10MP1,
For persistent messages:
1.Does "JMS Server Message Buffer" setting serve the same purpose as "Bytes Threshold High" under Threshold ?
2.If no, can someone explain the difference pls.
Many thanx,

Message Buffer Size relates to the number of message the JMS server keeps in the memory. The value of this determines when the server should start paging the message out of memory to a persistence store. So this is directly related with the memory/storage issue and the size of messages.
Bytes Threshold High relates to the performance of the JMS server. When this limit is reached JMS server starts logging the message and may even instruct he producer to slow down the message input.
So the if you get Bytes Threshold High messages that means you should check on your consumer (MDB who is picking up messages from the que), and try to increase its performance.
However if your Message Buffer Size is crossing limits then you should think of increasing the momory so that more messages can be kept in memory and disck IO can be reduce.
Anyone wants to add something more to it?

Similar Messages

JMS Message Buffer Size

Hi All,
          I am in need of some clarification regarding the following:
          According to the docs on:[url http://]http://edocs.bea.com/wls/docs92/perform/jmstuning.html#wp1149307
          The Message Buffer Size option specifies the amount of memory that will be used to store message bodies in memory before they are paged out to disk. The default value of Message Buffer Size is approximately one-third of the maximum heap size for the JVM, or a maximum of 512 megabytes.
          The question for me is: is the max of 512 megabytes, per weblogic server instance or per JMS server or per persistent store?
          Any help is greatly appreciated!
          -jeroen

Per JMS Server (the option is a JMS server option).
          Tom

Measure JMS Object message's size

Hi,
Is there any way that we can measure the size of our demands in the application server default storage ? For example, I use jboss, and it uses Hypersonic, but generally is there anyway to measure those demands we send out toward the application server?

Hi, have you got the solution of the problem? I am encountering the same issue here too. Thank you!

I'm having sever latency issues on Logic 9 through the built-in input (despite having no plugins active and 32 bit buffer size selected)

I'm literally running a guitar straight into my computer (no plugins, no interface, just the "built-in input" on my macbook) and there's a LOT of latency. I'm very experienced with Logic and pro-audio (I have logic on my other computer and it works fine) but for some reason there's a ton of delay on my signal. NO idea where to start with this one. I've examined every option within Logic and nothing seems to be helping. I've changed every parameter, including buffer size, disabling and reenabling core audio, and low-latency mode, but nothing has worked.
Any advice would be appreciated, thanks.
Also, I'm using a late 2011 15" Macbook (Quad core, 4 GB ram)

Never heard of this before... what are you using for output in Logic's Audio Prefs?
Are you on 10.7.5 as you signature says? There is a supplemental update for early builds of 10.7.5 that were released.
Take a look at the Audio portion the "Audio-MIDI Setup" in Utilities.
Bit-depth, sample frequency? Try it at 16-bit 44.1kHz. Is Logic set to the same?
What kind of cable are you using to get the guitar into Logic, the Mac audio input jack is multifunction, could you be partially enabling the digital I/O.
just tossing some ideas..

JMS Message Max Size

Hi,
          Could any of you please tell me what is the maximum JMS message size (text) in 6.1 and 7.0. How can we find this from the console?
          Thanks,
          -Sri


There is no max message setting on the JMS destination prior
          to 8.1, and there is no limit to JMS message size.
          Essentially, max message size is limited by network settings
          and JVM memory.
          The WL server's network settings, which
          apply to all network traffic to the server, not just
          JMS traffic, have a default max message size of 10MB. You
          can tune this via the MaxT3MessageSize parameter.
          I believe that this setting is deprecated in 8.1,
          (8.1 replaces it with a more generic network setting
          that is not protocol specific.) Note that JMS
          messages that are pushed from server to async
          consumers are aggregrated - so there may be
          up to 10 messages by default in a T3 network
          packet - this aggregation is configurable by the connection
          factory's "MessagesMaximum" setting - which is
          not a quota, but is instead limits the size
          of any aggregrated push.
          Tom
          Sri wrote:
          > Hi,
          >
          > Could any of you please tell me what is the maximum JMS message size (text) in 6.1 and 7.0. How can we find this from the console?
          >
          > Thanks,
          > -Sri

How to read messages longer than network buffer size

The logic of my application is:
the client sends a request to the server and wait, in blocking mode, for its response.
The server can responde with strings longer than 64KB (size of their sending and receiving buffer size), so under the hood, can also execs more than one socketChannel.write
Nothing in the message says where it finish, nevertheless the client needs to assemble all in one big
string.
How can the client deal with this ? I'd like keep it as simple as possible (without using a selector)
any thoughts ?
thanks in advance

Your above post suggests that it can send more than one packet (even ignoring the 64k limit.)
In that case the data of the message must contain sufficient information. If not then the solution is not determinate.
Ideally what you should received is a message and not just data. The message defines it contents. So you know how long it is and maybe even when it ends.
Alternatively the data might contain something. For example if you are recieving well formatted XML then you can create a simple parser that just looks for the end tag. If it isn't well formatted, or at least you can not rely on that then it is much harder.

WLS7 JMS Max Message Size

          I have done a search and found many questions on Max Message size, but I didnt
          find any relating specifically to WLS7.
          Q1: Is there a JMS Message Size limit the same as the T3 Max Message size?
          Q2: Does the WLS JMS implementation "chunk" large JMS messages into multiple T3
          messages?
          Cheers,
          Nick


Hi Nick,
          The performance is hard to predict. It is highly dependent on message
          type, application overhead, persistence, store type, CPU and network
          speed, etc., so you will need to measure it yourself. I think you will
          find that once message size exceeds 100K, perhaps less, perhaps more,
          JMS throughput is directly proportional to message size. (eg. it takes
          the same amount of time to send 10 100K messages as it does to send 1
          1MB message.)
          I understand what your "chunking" question were about now. You may
          find it useful to know that since its earliest releases, WebLogic
          outbound requests from one JVM to another are "single threaded" from a
          layered application's point of view: outbound traffic from one
          application must wait until previous requests posted by other apps are sent.
          Tom, BEA
          Nick Minutello wrote:
          > Thanks Tom, for the answers.
          >
          > My questions, I guess, are getting to the bottom of whether I can send huge messages
          > over WLS JMS - in the region of 10's of megabytes.
          >
          > Naturally, I can always send smaller messages - but there are occasions where
          > I have very large messages (files, in fact) and I prefer to have all processing
          > on the server side rather than the JMS client side.
          >
          > What are your thoughts?
          >
          > -Nick
          >
          >
          > Tom Barnes <[email protected]> wrote:
          >
          >>Hi Nick,
          >>
          >>Nick Minutello wrote:
          >>
          >>>I have done a search and found many questions on Max Message size,
          >>
          >>but I didnt
          >>
          >>>find any relating specifically to WLS7.
          >>>
          >>>Q1: Is there a JMS Message Size limit the same as the T3 Max Message
          >>
          >>size?
          >>
          >>Up to 7.0 there is no configurable for JMS max message size. In 8.1
          >>
          >>(public beta soon) it can be configured on the JMS server and/or on the
          >>
          >>JMS destination. In either case, the T3 max message size is a limiting
          >>
          >>factor.
          >>
          >>One thing to be aware of is that WL JMS aggregates asynchronous messages
          >>
          >>when pushing from server to asynchronous consumers - producing larger
          >>T3
          >>messages which can hit the T3 max limit. The number of messages that
          >>
          >>get aggregated is configurable on the WL connection factory
          >>(MessagesMaximum).
          >>
          >>
          >>>Q2: Does the WLS JMS implementation "chunk" large JMS messages into
          >>
          >>multiple T3
          >>
          >>>messages?
          >>
          >>Yes and No. (WebLogic "chunks" internally at the T3 layer, not the JMS
          >>
          >>layer.)
          >>
          >>
          >>>Cheers,
          >>>Nick
          >>
          >>Tom, BEA
          >>
          >
          >

How to configure JMS-Server to use username and password

Hi
Maybe this is a real stupid question, but please help me, I'm not very experienced using JMS:
I'm using JMS (provided by OC4J / Application Server 10.1.3). I configured a ConnectionFactory (without username and password) and a Queue and there is also a application, which successfully opens the JMS-Connections.
This works well as long as I do not provide a username und password in the ConnectionFactory (EnterpriseManager: OC4J/Admin/Services/JMS-provider...). If I do this, my application terminates with the following stacktrace:
javax.jms.JMSSecurityException: JMSServer[aplora2:12602]: failed to authenticate "myuser/mypassword", no such user.
     at com.evermind.server.jms.JMSUtils.make(JMSUtils.java:1034)
     at com.evermind.server.jms.JMSUtils.toJMSSecurityException(JMSUtils.java:1090)
     at com.evermind.server.jms.JMSServer.getJMSServer(JMSServer.java:1237)
     at com.evermind.server.jms.JMSServer.getJMSServer(JMSServer.java:1213)
     at com.evermind.server.jms.InContainerProxy.getJMSServer(InContainerProxy.java:93)
     at com.evermind.server.jms.EvermindConnection.<init>(EvermindConnection.java:103)
     at com.evermind.server.jms.EvermindQueueConnection.<init>(EvermindQueueConnection.java:62)
     at com.evermind.server.jms.EvermindQueueConnectionFactory.unprivileged_createQueueConnection(EvermindQueueConnectionFactory.java:98)
     at com.evermind.server.jms.EvermindQueueConnectionFactory.access$000(EvermindQueueConnectionFactory.java:42)
     at com.evermind.server.jms.EvermindQueueConnectionFactory$1.execute(EvermindQueueConnectionFactory.java:78)
     at com.evermind.server.jms.InContainerProxy.doSecureOp(InContainerProxy.java:157)
     at com.evermind.server.jms.EvermindQueueConnectionFactory.createQueueConnection(EvermindQueueConnectionFactory.java:75)
     at com.evermind.server.jms.EvermindQueueConnectionFactory.createQueueConnection(EvermindQueueConnectionFactory.java:66)
     at sam.model.messages.MessageManager.<init>(MessageManager.java:74)
where "myuser" and "mypassword" are the username and password I entered in the ConnectionFactory. (My Application certainly uses the same username and password)
I expected, that by entering username and password here I would configure my Queue to be protected by them. But obviously there are some very basic things I didn't understand. Can anyone give me a hint, how I can protect the (OC4J-) JMS-Server or the Queue by username and password?
Thanks for your help
Frank Brandstetter

Hey Frank -
Assuming you've set up users in the "Security Manager" for your application, you can specify what JNDI resources they can "read" (and thus also connect to) via the orion-application.xml file. Look at the following snippet from the orion-application.xml file:
     <namespace-access>
<read-access>
<namespace-resource root="jms/firstQueue">
<security-role-mapping impliesAll="false" name="jmsSecurity">
<user name="scooter"/>
</security-role-mapping>
</namespace-resource>
</read-access>
<read-access>
<namespace-resource root="delme">
<security-role-mapping impliesAll="false" name="jmsSecurity">
<group name="messagingUsers"/>
</security-role-mapping>
</namespace-resource>
</read-access>
</namespace-access>
This would say that only the user "scooter" that you've set up would have access to the Queue whose JNDI name begins with jms/firstQueue. Anyone you've set up and added to a messagingUsers group would have access to any Queues whose JNDI name begins with "delme". (I'm honestly not sure what exactly this line does: <security-role-mapping impliesAll="false" name="jmsSecurity">)
This is the only way I've found to limit access to a particular Queue.
HTH.
Scott

Load balancing MQ 7.0 Foreign JMS Server and Weblogic 10 MDBs?

We have the following configuration and we are trying to troubleshoot what appears to be a load balancing issue.
We have 3 Solaris servers. Each Solaris server has two Weblogic managed servers running on it. There are a total of 6 managed servers in the Weblogic cluster.
MQ Series 7.0 is also installed on each Solaris server. The MQ queue managers are in a MQ cluster. Each queue manager has the same queues defined.
We have a foreign JMS Server configured on Weblogic that has destinations and a connection factory defined. There aren't many configuration options available for the connection factory. The destinations are bound to the queues defined on MQ using the MQ bindings file.
The MQ bindings file was generated using the TRANSPORT(BIND) mechanism. Each bindings file points to the queue manager running on that machine. So the 2 managed servers running on one machine are accepting messages from the queue manager on that machine.
The MDB's listenning for messages on the MQ queues are configured as follows in the weblogic-ejb-jar.xml:
<max-beans-in-free-pool>16</max-beans-in-free-pool>
We also created a custom work manager with min threads constraint=5 and max threads constraint=16. The dispatch-policy of all the MDBs is set to the custom work manager.
The open input count on each MQ queue managers shows up as 32 which is expected.
The default load algorithm on the cluster is round-robin.
When we run a load test (injecting 40 messages per second on one MQ queue), we notice that one managed server ends up being significantly loaded than the other. Each MQ queue manager in the MQ cluster receives approximately the same number of messages in the load test. But it seems like one managed server is preferred over the other in Weblogic.
What can be done to equally balance the load among the two managed servers on each Solaris server?
Thanks for the help.

Load balancing generally applies at determing how many consumer threads has to be created on each of the clustered queue instance. In that sense you have achieved perfect load balancing as your queue instances has the same no of consumer threads.
Once you have set 'x' consumer threads on a queue, it is upto messaging provider to decide which thread to deliver a particular message and you will hardly have any control over this. Since your 32 threads are listening on the same queue, MQ can select any thread for delivering the message and the behaviour could be non deterministic.
One option to change your design is to have a dispacther mdb which picks the messages off the MQ and then routes to a weblogic distributed destination and you can have your core mdb which does all processing listen to this distributed destination. You can enable load balancing when the disaptcher mdb routes the message to the distributed destination. Since dispatcher MDB is nothing more than a router, the unbalanced consumption off the MQ shouldn't seriously affect the server.

Foreign JMS Server vs Messaging bridge

Could any body tell me which one is the best Whether Foreign JMS Server or Messaging bridge for connecting Weblogic to IBM MQ Series.I am trying to use foreign jms server but i dont know how to post the message to that queue i created in foreign jms server..

Hi,
          For sending messages non-transactionally, foreign JMS server is sufficient. For sending messages transactionally using standard JTA transactions, the simplest way is to send them on the server and reference the foreign JMS through an EJB resource reference. See the the following FAQ for a walk-through of the various options, including guidance on when to use a bridge:
          http://e-docs.bea.com/wls/docs81/faq/interop.html
          Tom

Messaging Bridge/Foreign JMS Server

Can someone clarify what is the difference in using messaging bridge or Foreign JMS Server in listening to a topic from other weblogic server of same version.
Edited by: user11359157 on 6 Jul, 2009 3:17 PM

I always thought one has to use remote classes from the foreign JMS server in local the classpath to send or receive messages stored at
the foreign JMS server / the remote side.
<Jayesh> that is true of the remote side of the JMS is non-weblogic. </Jayesh>
Also in the WLS bridge this can be specified. IMHO the bridge has the advantage that I can use the wls classe and the bridge knows
the classpath and bridges to the foreign jms server, so the application developer doesn't have to use foreign classes, eg. tibco or mq.
<Jayesh> When you have remote JMS is WebLogic it is obvious considering that both remote and local jms uses same weblogic classes. </Jayesh>
Now, where does this happen for the foreign jms server (which is kind of alternative to wls bridge, without store and forward)?
All I can see is a local JNDI lookup being translated to a remote one.
Is really the local JMS implementation used to talk to the remote JMS server?
When a JNDI lookup for a queue happens will then be WLS queue implementation returned?
<Jayesh> No there is not local JMS store is used. Foreign JMS server just provides administrative convenience by moving remote JMS destination JNDI definitions in local JNDI definition. It allows to use this local definition by all EJBs, servlets and messaging bridges. If the remote definitions changes you can change those definition in admin console and does not need change in deployment descriptors of the EJBs and servlets to prevent redeployment. Again this is no administrative convenience and during run time it will behave exactly same as you are sending or receiving message directly from remote JMS destination.
</Jayesh>
Hope this clears confusion.
jayesh@yagna

Message EJB using Weblogic JMS Server

Hi,
          I trying get some working logic about using JMS with weblogic. I have created a JMS Server instance with all the necessary Connection Factories and Destinations. I am able to connect to from a normal Java class, but i want to deploy a message driven ejb in weblogic and connect to the same JMS Server instance. When i deploy my EJB i get an error about unable to connect to the JMS Server in the weblogic.log . Could any please refer me to any resourcce that may help me.


          Thanks, i got it sorted out.
          Tom Barnes <[email protected]> wrote:
          >Unless you're descriptors make use of the weblogic extensions to specify
          >the jndi URL, make sure that the MDB and the JMS Server instance are
          >either
          >both located on the same WL server or are both in the same cluster.
          >
          >If this doesn't help, please post the stack trace for you're error
          >and attach your config.xml and MDB descriptor xml.
          >
          >Tom
          >
          >Riaan Minne wrote:
          >
          >> Hi,
          >>
          >> I trying get some working logic about using JMS with weblogic. I have
          >created a JMS Server instance with all the necessary Connection Factories
          >and Destinations. I am able to connect to from a normal Java class,
          >but i want to deploy a message driven ejb in weblogic and connect to
          >the same JMS Server instance. When i deploy my EJB i get an error about
          >unable to connect to the JMS Server in the weblogic.log . Could any
          >please refer me to any resourcce that may help me.
          >

T61p 200gb at 7200rpm buffer size and real world performance?

Hi, I wanted to confirm what the buffer size on the 200gb 7200 option of the T61p had... there seems to be conflicting information regarding this model. I'd also appreciate any information regarding the real world performance of this particular drive...
Thanks!
Message Edited by carthikv12 on 05-19-2008 09:31 AM
Solved!
Go to Solution.

both the hitachi and seagate 200GB/7200RPM drives used in the T61p have 16MB of onboard cache. performance tests of these two drives are scattered across the internet. search google for "hitachi 200GB 7K200" and "seagate 200GB 7200.3" respectively.
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JMS Server Message Buffer Size & Thresholds and Quotas settings

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