On Thu, Aug 11, 2011 at 11:36 AM, John Cheng <[email protected]> wrote:
> On Thu, Aug 11, 2011 at 11:02 AM, Adam Kocoloski <[email protected]>wrote: > >> Hi John, first thing I'd point out is that Filipe and Paul have done quite >> a lot of work on the JSON processor since 1.0.2 was released. Trunk >> contains a JSON processor that calls out to YAJL instead of relying on pure >> Erlang code. The improvement for large document bodies is pretty >> substantial. Also, processing MBs of JSON is going to be CPU-bound in >> 1.0.2. CouchDB makes good use of multicore servers to distribute some of >> the load if you throw concurrent requests at it. Hope that helps, >> >> Adam >> > > It does help here. I'll see if I can get compile the latest version of > CouchDB on Ubuntu 10 LTS. It's been an adventure trying to compile CouchDB > so far! > Just compiled CouchDB 1.1.0 Testing with doc target size = "100 kB", # of properties = "10", updates = "500", numDocs = "100" each document is approximately 100.1 kB Using increment handler function to perform update 500 updates in 42.1960351467 seconds, 11.8494545343 ops/second Now the updates dropped from 23 updates/sec to 11.84 updates/second Even inserts dropped to 24 inserts/second. Accroding to iostat, CPU was mostly idle (~85 to 92%) and I'm only getting 300 kB writes per second. I guess this could be a problem with httplib2. Is there any configuration or compile time options I may have missed that could cause such a big drop in performance? -- --- John L Cheng
