Type start /? on your command line for how to start a command with a low or background priory.

Hit ctrl-alt-del to bring up the task manager, right-clock the name on the processes tab and use "set Priority" ona running process.

See Win32::Process and use the appropriate constant from:

        HIGH_PRIORITY_CLASS
        IDLE_PRIORITY_CLASS
        NORMAL_PRIORITY_CLASS
        REALTIME_PRIORITY_CLASS
        THREAD_PRIORITY_ABOVE_NORMAL
        THREAD_PRIORITY_BELOW_NORMAL
        THREAD_PRIORITY_ERROR_RETURN
        THREAD_PRIORITY_HIGHEST
        THREAD_PRIORITY_IDLE
        THREAD_PRIORITY_LOWEST
        THREAD_PRIORITY_NORMAL
        THREAD_PRIORITY_TIME_CRITICAL
        ABOVE_NORMAL_PRIORITY_CLASS
        BELOW_NORMAL_PRIORITY_CLASS

[download]

if you are starting the process from within perl.

Personally, I find the first option the simplest even when starting a process from with a perl script:

system q[start /low notepad.exe];;

[download]

as it also allows me to set the affinity mask.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

The start of some sanity?

In reply to Re: Set thread quantum for process under Windows by BrowserUk
in thread Set thread quantum for process under Windows by chessgui

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.