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I'm not sure I know enough to answer that, no matter how much I've studied the subject lately, but I'm curious what you are basing your "in which case I was wasting more than 700MB" concern on. If you are looking at the memory pool and the NSF Buffer pool, keep in mind that there are other processes besides the buffer pool that will be making claims on that memory pool. Are you on ND6, also? I would definitely recommend the redbook if you are (actually, I think it's probably going to be informative, if not directly useful, for about anyone). Domino for iSeries Sizing and Performance Tuning was published in 2002 and can be found at http://publib-b.boulder.ibm.com/abstracts/sg245162.html?Open Domino 6 for iSeries Best Practices Guide was published in 2004 and can be found at http://www.redbooks.ibm.com/abstracts/sg246937.html?Open Hope that helps, Patrick Tom Kreimer <tkreimer@infoalt .com> To Sent by: Lotus Domino on the iSeries / AS400 domino400-bounces <domino400@xxxxxxxxxxxx> +ptrapp=nex-tech. cc com@xxxxxxxxxxxx Subject Re: Best Practices 08/11/2006 03:16 PM Please respond to Lotus Domino on the iSeries / AS400 <domino400@midran ge.com> So, If I have 1.2 GB allocated to a (Fixed) memory pool used just for a DPAR, and a SHOW STAT MEM shows that I'm only using 944MB, can I assume that I'm wasting about 200MB with of memory and can reduce the pool size? Prior to this message thread, our NSF Buffer pool was still manualy set at 300MB, in which case I was wasting more than 700MB? Mem.Allocated = 944,450,548 Mem.Allocated.Process = 63,273,308 Mem.Allocated.Shared = 881,177,240 Mem.Availability = Plentiful Mem.PhysicalRAM = 1,258,291,200 ==================================== Tom Kreimer Information Alternatives -----domino400-bounces+tkreimer=infoalt.com@xxxxxxxxxxxx wrote: ----- To: Lotus Domino on the iSeries / AS400 <domino400@xxxxxxxxxxxx> From: "Patrick Trapp" <ptrapp@xxxxxxxxxxxx> Sent by: domino400-bounces+tkreimer=infoalt.com@xxxxxxxxxxxx Date: 08/10/2006 09:29AM Subject: Re: Best Practices Yeah, I didn't try to quote the entire section of book -- we all know I'm wordy enough without plagiarizing in my posts. Right now, my pool size is at the default 748 and my %reads yesterday are running 98% - 99%. Today, the numbers are more reasonable, but they still indicate that a change is in order. Thanks for the confirmation. Patrick Chris Whisonant <Chris.Whisonant@ comporium.com> To Sent by: Lotus Domino on the iSeries / AS400 domino400-bounces <domino400@xxxxxxxxxxxx> +ptrapp=nex-tech. cc com@xxxxxxxxxxxx Subject Re: Best Practices 08/10/2006 07:15 AM Please respond to Lotus Domino on the iSeries / AS400 <domino400@midran ge.com> That sounds about right. What's your current pool size? If you drop it and the %reads goes below 95%, then you should raise it. Also, it's generally recommended to raise or lower the buffer pool in increments of 10%. Something else I found out is that if you don't define the buffer pool size, then the defaults are as follows: NSF Buffer Pool ? how size is set Domino R5 - Set to 300 MB by default on iSeries Domino 6 - Set to 748 MB by default on iSeries Domino 7 - Set to 748 MB by default on iSeries What to monitor when fine tuning Non-database paging faulting = < 100 faults/processor Database.BufferPool.PercentReadsInBuffer >= 95% Database.DbCache.MaxEntries = 3 X BufferPool Chris Whisonant Comporium Senior Mid-Range Systems Administrator IBM eServer Certified Systems Expert - iSeries Technical Solutions V5R2 IBM Certified System Administrator - Lotus Notes and Domino 6/6.5 IBM Certified Associate Developer - Lotus Notes and Domino 6/6.5 803.326.7270 domino400-bounces+chris.whisonant=comporium.com@xxxxxxxxxxxx wrote on 08/09/2006 05:08:53 PM: > > Related to an earlier question I floated through this forum, I've been > investigating how big was big enough on the NSF_BUFFER_POOL_SIZE parameter. > On page 230 of the "Domino 6 for iSeries Best Practices" redbook, they lay > out some variables to compare and they make the (sort of paraphrased) > statement that "The NSF_BUFFER_POOL_SIZE is too large if > Database.Database.BufferPool.PerCentReadsInBuffer is between 94% and 99%, > but > Database.DbCache.MaxEntries is about 40% larger than > Database.DbCache.HighWaterMark." > > A little later, it indicates that it's just right if the > Database.DbCache.MaxEntries is not more than 20% larger than > Database.DbCache.HighWaterMark. > > So I'm taking this to mean that if Database.DbCache.MaxEntries is more then > 40% larger, I should consider adjusting the size of the pool down. For > example, if Database.DbCache.MaxEntries is 1500 and > Database.DbCache.HighWaterMark is 900, the pool is larger than necessary. > > Does that sound right to you? > > Thanks, > Patrick _______________________________________________ This is the Lotus Domino on the iSeries / AS400 (Domino400) mailing list To post a message email: Domino400@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/domino400 or email: Domino400-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/domino400.
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