Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Thanks for the response, Lars. Followup questions below.... On Jun 12, 2007, at 9:19 AM, Lars Ellenberg wrote: >> 2. Can I eck out more throughput by increasing sndbuf-size? Does that >> increase my write latency when using Protocol C? > > most likely not. Is that a no on the throughput, the increased latency, or both? :) >> 3. What's a reasonable formula for determining max-buffers? Does >> increasing them imply I should increase something else too? > > that number is basically in "pages", iirc, so if you compare > (max-buffers * 4k * number of drbd's in use) to your physical RAM, > it should be some not too impressive number. Got it. Is there a benefit to increasing it? >> 5. Does decreasing max-epoch-size reduce my write latency? > > most likely not. What are the tradeoffs with turning this knob, then? >> Does anybody have any experience playing with the schedulers in the >> 2.6 kernel? > > yes of course. > but the answers here depend very much on what you specifically ask > for. I'm looking to make me a database cluster, so I'm looking to minimize latency for random reads and writes.