Re: write-scaling problems in LMDB

On Mon, Oct 20, 2014 at 1:53 PM, Howard Chu <hyc(a)symas.com&gt; wrote: >> then it would be possible to make a direct comparison (against the >> figures you just sent), against the e.g. 32-threads case. 32 readers, >> 2 writers. 32 readers, 4 writers. 32 readers, 8 writers and so on. >> keeping the number of threads (write plus read) to below or equal the >> total number of cores avoids any unnecessary context-switching > > We can do that by running two instances of the benchmark program > concurrently; one doing a read-only job with a fixed number of threads (32) > and one doing a write-only job with the increasing number of threads. ohh, ok - great. saves a job doing some programming at least.