Search Again: Re: Capacity From: andrew kagan Date: Friday, November 5, 1999 Time: 4:41:00 pm > That's a very good question. I've asked it several times, and have never > really gotten a solid response. I know that there is a "Zen" of QDNS Pro, > when it comes to setting the RAM on different machines. I've been running > my primary on a 6220 CD, (75Mhz 603, and the slowest PowerMac ever made) > with 24MB of RAM (12 allocated to QDNS Pro 2.2.1) and have found that under > a pretty good load (3-10 quirries per seccond) less RAM is better than more > RAM. I'm only assuming that it's faster to search 1.5MB of cached records, > and then resolve a name using an external server(s) than it is to sort > through 11.5MB of cached records. I think it has more to do with disk cache, bus speed, processor activity, process priority and a zillion other issues than the actual ram allocated to QDNS...unless you've throttled the ram allocation under the minimum. > > I'm sure there has to be a guideline to setting RAM on different speeds of > machines. Or is more allways better? Can anyone clarify this? Beyond the amount of RAM required per record per domain (read: Miniscule, although I'll let Chris elaborate on the exact number of bytes), it shouldn't make any difference. > > Here's a good question for the DNS gods..... why is a zone transfer faster > from a 25Mhz Performa 600 (2MB allocated to QDNS Pro) (250+ records, > 500ms) than the 75Mhz Performa 6220 (same 250+ records 2200+ ms) See my first response. > > > Performa 600- 2MB allocated to QDNS Pro, 250+ records transfered in ~500ms > Performa 6220 12MB allocated to QDNS Pro, same 250+ records transfered in > ~2300ms > > So, I append this question, and ask the list: > > What are QDNS Pro's upper limits in terms of resolving DNS quiires? What do queries have to do with zone transfers? Any upper limits will be determined by the hardware, not the software, at this point...unless you're running an authoritative root server.

Messages In This Thread: Capacity by Steve Dannaway on Nov 5, 1999 at 3:30:00 pm Re: Capacity by Jerry Pasker-Systems Admin. on Nov 5, 1999 at 4:16:00 pm Re: Capacity by andrew kagan on Nov 5, 1999 at 4:23:00 pm Re: Capacity by Jerry Pasker-Systems Admin. on Nov 5, 1999 at 4:23:00 pm Re: Capacity by andrew kagan on Nov 5, 1999 at 4:37:00 pm Re: Capacity by andrew kagan on Nov 5, 1999 at 4:41:00 pm Re: Capacity by Jerry Pasker-Systems Admin. on Nov 5, 1999 at 4:58:00 pm Re: Capacity by andrew kagan on Nov 5, 1999 at 5:29:00 pm Re: Capacity by Jerry Pasker-Systems Admin. on Nov 5, 1999 at 10:09:00 pm Re: Capacity by Men & Mice Support on Nov 5, 1999 at 10:59:00 pm Re: Capacity by Warren Michelsen on Nov 6, 1999 at 12:05:00 am Re: Capacity by Jerry Pasker-Systems Admin. on Nov 6, 1999 at 12:45:00 am