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  1. #1
    Platinum Lounger
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    Setting the Maximum Registry Size value

    Using the usual Start => Settings => Control Panel => System => Performance => Virtual Memory => Change => Maximum Registry Size procedure (or equivalent) it's possible to set a higher value than that to which NT defaults.

    It's also possible to use DUREG.EXE from the Windows 2000 Resource Kit to determine the "Total Registry data size".

    For the sake of argument, let's say that the "total registry data size" for an NT 4 workstation comes out at 16 MB and the current Maximum Registry Size is set to 20 MB.

    Is there any performance downside, or any other problem, with setting the Maximum Registry Size to 30 MB, 40 MB or even 80 MB? There would be no problem about "potentially allocating" this huge amount of additional disk space, of course!

    NOTE I'd better say that I've read through much of the TechNet stuff that relates to the RegistrySizeLimit key, but I can't find anything about performance!
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

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  2. #2
    Plutonium Lounger Leif's Avatar
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    Re: Setting the Maximum Registry Size value

    I've certainly never heard mention of any performance issue - But I did come across this from"Tuning Through the Windows NT Registry":
    <hr>Registry Size Limitations
    The Registry is stored in memory in the paged pool and therefore can be written to the swap file when not in use (unlike the main kernel which is stored in the nonpaged pool of memory). The kernel is never removed from physical RAM. The HKEY_LOCAL_MACHINE SystemCurrentControlSetControlRegistrySizeLimit value defines how much of the paged pool the Registry can consume. This setting keeps the Registry from using all available memory space, which active processes may well need. The RegistrySizeLimit value entry simply sets a size boundary on the Registry. It neither allocates paged pool space nor guarantees that the necessary space will be available. The default size of this value entry is 25 percent of the paged pool. If the paged pool size changes for whatever reason, the value of RegistrySizeLimit is adjusted accordingly. <hr>

  3. #3
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    Re: Setting the Maximum Registry Size value

    Thanks, Leif - they seem to have paraphrased the information from Chapter 23 of the Windows NT 4 Resource Kit.

    I note a couple of things from the TechNet articles I encountered:

    * Installing IE 6 requires that there be at least 4MB of "free Registry Space", even though it only (ONLY!!) writes 2 MB of data into the Registry

    * The "your system is running low on Registry quota" message is issued if the amount of data in the registry reaches 95% of the Registry Size Limit/Maximum Registry Size

    Seems like another BATch file to increase the Registry SIze Limit of 2200-odd PCs... <img src=/S/doctor.gif border=0 alt=doctor width=25 height=33>
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

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  4. #4
    Plutonium Lounger Leif's Avatar
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    Re: Setting the Maximum Registry Size value

    What's odd about them? <img src=/S/innocent.gif border=0 alt=innocent width=20 height=20>

  5. #5
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    Re: Setting the Maximum Registry Size value

    Nothing odd, really - just that recent AntiVirus install has added 700 KB, and IE6 will add 2 MB, and it all mounts up.
    'Bout time we increased the maximum sizes to take us through until XP (where there ISN'T a Maximum Size -- hooray!).
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

    Ita, esto, quidcumque...

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