Re: How to increase userthread in Informix 7.11

Kate, Tomchik/IS/SSC/THD@emory.mathcs.emory.edu wrote: > > 128 is the number of threads, which doesn't really mean 128 active users > because we get error messages long before we reach that number on our systems. > You need to change the NETTYPE variable as follows: > > NETTYPE ipcshm,1,100,CPU> > 100 is the number of users. You can change ipcshm to whatever connection type > you are using (that is the default). If you have more that two CPUs you may > want to change the 1 to (number of CPUs - 1). > > cw.Lin @ Taiwan.ncr.com ("cw.Lin") > 09/11/96 08:04 AM > To: informix-list @ rmy.emory.edu @ INTERNET > cc: (bcc: Kate Tomchik/IS/SSC/THD) > Subject: How to increase userthread in Informix 7.11 > > We would like to know how to increase the number of userthreads in > Informix 7.11UC2 ? > From the last line of "onstat -u " command show as followings: > " active user xx , 128 total , max concurrent user xxx" > > Does this "128 total" is the number of user licence ? > can we increase the user threads more than 128 without user licence > upgrade ? > > Best Regards. > C. W. LIN > cw.lin@taiwan.ncr.com With Informix 7+ systems, USERS and TRANSACTIONS parameters in config files are made dynamic. Informix starts off with 128 userthreads as default and keeps alloting in blocks of 128 subsequently based on the user activity requirements. As far as i know there is no limit on the number of userthreads it can grow to except for the limitations of the shared memory. Once it reaches its shared memory limit( i.e. if it can't get any more memory from system), the Informix online system will hang. The only way you can make sure that the userthreads are not growing beyond a limit is ny specifying in the config file NETTYPE parameter, where you specify the maximum users that can be connected to On-line system. One clarification is needed here, when Informix comes on-line, the online engine will start some threads for its use (ex: there will 8 oninit threads, #of page cleaner threads, etc). That is the reason why though you do not physically have 128 users, online will add another block of userthreads to the system. in the 'onstat -u' command last line, # active is the number of currently active threads, #total is the number of threads available to become active before online dynamically adds more and finally the #Max is the maximum active threads that the online system has after it has started. You would have to remember that when bounce the online, system again will start from defaults and keeps growing. Hope this will clarify the issues. Zakeeer