[DRBD-user] Poor DRBD performance, HELP!

Felix Frank ff at mpexnet.de
Tue Jun 21 17:36:09 CEST 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On 06/21/2011 05:15 PM, Noah Mehl wrote:
> The results are the same :(

Sorry to hear it.

> How do I know what to set in the tuning sections?  How do I measure these attributes?  Should I be using an MTU of 9000?

I cannot advise much further than that, except that I remeber using a
value of 131072 for max-buffers at least once, but I'm not certain
that's wise.

What type of link are you using again?

What kind of load to you see during your test on both nodes? Is it
possible that the Secondary is slowing you down?

As an aside, you certainly don't want a syncer-rate of 1000M. Don't use
more than 30% of your total bandwidth for syncing. The syncer rate has
no influence on the replication throughput (except when an ongoing sync
is bogging down your link).


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