Number of Processes ???

[Chad Ward]

I have a question concerning a limit on the number of processes you can have on cloverleaf.   The reason I’m asking is that just out of the blue the interface will drop a process and you can not get it to start backup without having to recycle the whole interface.

Topic

[garry r fisher]

Hi,

I don’t think there is a simple answer to that question. I suspect it will depend upon the version of Clovrleaf, the OS and the specification of your server.

I know from reading other posts that in the USA you have far bigger systems than we do – the most processes we tend to have is about 10 – 12 with each process managing between 2 and 4 threads.

How many processes do you currently have?

Hopefully somebody will be able to give you a mode definitive answer.

Garry

[Anonymous]

What OS are you running on?

On Windows I have seen a process die, and not be able to be restarted until the hostserver is bounced.

[Chad Ward]

Guys,

Our OS is AIX, we had about 26 processes running about 2 – 6 threads each.  With all the problems occuring we combined the processes down to a total of 10 processes.  We have not had anymore problems since, but it has only been 2 days, so far so good.  I have a support person looking up the limits for processes and also for number to threads.  Thanks for all the help.

[Mark Gathers]

We have nearly 40 processes running anywhere from 1 to 4 threads using QDX 5.1 & AIX 5.1

[Rob Lindsey]

Currently we are running on AIX 5.1 CL 5.3 rev3 with 27 sites with the number of prcesses to be between 2 and 6.  Each process is managing anywhere between 2 and 20 threads.

I believe you are going down the right track by looking at the limits but it will also comes down to size and number of CPUs, how much data you are trying to process and memory allocation.

Rob

[Ben Hochstedler]

Only 512KB is allocated for non-interactive processes’ heap on Windows (NT, 2000, XP, 2003, etc).  Too many processes in QDX will eat it up, and occassionally you’ll see the following if another non-GUI process is started & not enough heap space is available:

Quote:

Application popup: cmd.exe – Application Error : The application failed to initialize properly (0xc0000142). Click on OK to terminate the application.

The command can be any command that is run under a non-interactive service (a service that is not marked as being able to interactive with the Windows desktop).

Workarounds:

[Author]

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