Results 1 to 7 of 7
  1. #1
    Member
    Join Date
    Aug 2008
    Location
    HCM City
    Posts
    7

    Lightstreamer Monitor Console

    We would like to monitor Lightstreamer server's performance like number of connections and sessions. What are the meaning of these parameters? Is there any limit for number of connections/sessions in the Moderato version or how to change these limits.
    Thank you in advance.

  2. #2
    Administrator
    Join Date
    Jul 2006
    Location
    Milan, Italy
    Posts
    517
    There are no limits on the number of connections and sessions within an instance Lightstreamer Moderato server.

    You can find an explanation of the variables shown by the Monitor Console in section 4.2.1 of "General Concepts.pdf".

  3. #3
    Member
    Join Date
    Aug 2008
    Location
    HCM City
    Posts
    7
    Thank you.

  4. #4
    Member
    Join Date
    Aug 2008
    Location
    HCM City
    Posts
    7

    New Events/sec and Pre-Filtered Events/sec

    I have tried to understand these statistics from the "General Concepts" but still very confused:
    "ITEMS.EVENTS_SEC The frequency of inbound events flowing from all Data
    Adapters, within any Adapter Set, into LS Kernel in the last sampling period. It is
    expressed as events per second.

    ITEMS.FILTERED_EVENTS_SEC The frequency of outbound events flowing from
    the Preprocessor of LS Kernel in the last sampling period. It is expressed as events
    per second."

    Could you please explain a little more about these statistics regarding performance of the LS server? We're running a LS server which shows the following statistics in the monitoring console:

    Items: Total Subscribed: 485; new Events/sec: 512 - 546; pre-filtered events/sec: 512 - 546.

    Is there any problem with these statistics and what should I change in the adapter or in client script to improve the performance of the server?
    Thank you.

  5. #5
    Administrator
    Join Date
    Jul 2006
    Location
    Milan, Italy
    Posts
    517
    That means you have around 530 events/sec injected by your Data Adapter into the Lightstreamer Server. Of course that is NOT a symptom of performance issues.

    A quick indicator of possible performance issues in the Monitor Console is the "Thread pool" row. If you see no threads in Waiting state, that could imply that the system is working at its full capacity.

  6. #6
    Member
    Join Date
    Aug 2008
    Location
    HCM City
    Posts
    7

    Performance Issues

    Quote Originally Posted by Alessandro
    That means you have around 530 events/sec injected by your Data Adapter into the Lightstreamer Server. Of course that is NOT a symptom of performance issues.

    A quick indicator of possible performance issues in the Monitor Console is the "Thread pool" row. If you see no threads in Waiting state, that could imply that the system is working at its full capacity.
    Thank you, now I understand what is Waiting indicator, but still don't know how to control the Thread Pool (i.e. how does the number of Thread effect the performance?)
    BTW: I would like to know how to prevent the error "LS 120" in the case of an user opens more then one session using the same browser. I even had this error message if the connection is slow.

  7. #7
    Administrator
    Join Date
    Jul 2006
    Location
    Milan
    Posts
    973
    Some control of the internal thread pool is possible.
    See the <*_pool_*> elements in the Server configuration file for details on the possible effects.
    The forthcoming 3.6 release will feature a better separation of potentially blocking tasks into dedicated thread pools.

    Client error 120 is a totally independent matter.
    Please refer to this post, for instance.

 

 

Similar Threads

  1. Log data (on server & monitor)
    By Heritage in forum General
    Replies: 1
    Last Post: April 9th, 2010, 10:12 AM
  2. web client is not updating , no errors in server console
    By kishorekkk in forum Adapter APIs
    Replies: 1
    Last Post: April 10th, 2009, 08:33 AM
  3. User and password for access to monitor
    By webfg in forum General
    Replies: 1
    Last Post: April 6th, 2009, 12:29 PM
  4. How to Monitor LS Server
    By indrajit in forum General
    Replies: 8
    Last Post: February 25th, 2008, 11:21 AM
  5. Monitor Console Adapter
    By JMolina in forum Adapter APIs
    Replies: 1
    Last Post: October 5th, 2007, 09:03 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT +1. The time now is 10:14 AM.