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  • 1.  Is there a way to throttle/ limit pty login requests

    Posted Thu July 27, 2006 01:54 PM

    Originally posted by: SystemAdmin


    Hello Everyone,

    I have a p550 quad core 1.5GHZ processor card. There is 16GB of RAM. After system reboots, user's experience extremely long login times. The CPU idle time drops to 0! This makes the system crawl for 45 minutes. Once the system stabilizes, the system is only about 25-30% CPU utilized. I was wondering if there is a way to limit the number of login requests to pty sessions in order that the system does not grind to a halt. If we could throttle this so that only so many login requests were handle within a time frame.

    If anyone has any other suggestions, I would like to hear about them?

    thanks,
    James Marcinek
    #AIX-Forum


  • 2.  Re: Is there a way to throttle/ limit pty login requests

    Posted Thu July 27, 2006 04:14 PM

    Originally posted by: nh4aix


    James -

    it seems to me that the problem is not how many folks are logging on, but what is going on during those first 45 minutes of booting... that is highly unusual.

    to answer you specific question, I suggest you look at changing the "maxlogins" attribute in /etc/security/login.cfg

    reference: http://publib.boulder.ibm.com/infocenter/pseries/v5r3/topic/com.ibm.aix.doc/files/aixfiles/login.cfg.htm
    #AIX-Forum


  • 3.  Re: Is there a way to throttle/ limit pty login requests

    Posted Thu July 27, 2006 04:49 PM

    Originally posted by: SystemAdmin


    I am starting to wonder if underlying cause is a large /etc/passwd file. There are well over 1100 user's on the system and currently /etc/passwd is being used for authentication. A product is used called Centrify which seems to proxy between AD and UNIX/linux; however I have confirmed that it is not running currently. I am somewhat confused, if does run, then shouldn't the authenticaion id's be on the AD side? If the info is in /etc/passwd, there must be some type of mapping between the 2?

    Thanks,

    James Marcinek
    #AIX-Forum


  • 4.  Re: Is there a way to throttle/ limit pty login requests

    Posted Thu July 27, 2006 05:49 PM

    Originally posted by: SystemAdmin


    I am starting to wonder if underlying cause is a large /etc/passwd file. There are well over 1100 user's on the system and currently /etc/passwd is being used for authentication. A product is used called Centrify which seems to proxy between AD and UNIX/linux; however I have confirmed that it is not running currently. I am somewhat confused, if does run, then shouldn't the authenticaion id's be on the AD side? If the info is in /etc/passwd, there must be some type of mapping between the 2?

    Thanks,

    James Marcinek
    #AIX-Forum


  • 5.  Re: Is there a way to throttle/ limit pty login requests

    Posted Fri July 28, 2006 07:45 PM

    Originally posted by: SystemAdmin


    If you are using a large number of users, try index the passwd file with
    mkpasswd. Also check for errors with pwdck.
    #AIX-Forum


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