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From Johannes Schneider <maili...@cedarsoft.com>
Subject Performance decrease from 1.0.1 to 1.2.0
Date Fri, 18 May 2012 18:59:19 GMT
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Hi guys,


I am using Ubuntu 12.04 (x86_64) with the default CouchDB installation.
And I have created some very small tests to check the performance.

It is just one simple "get".


With 1.0.1 it used to take about 1 or 2 milli seconds. Since the
upgrade the same GET takes about 40 millis.
I am quite sure that there is some type of misconfiguration...
Anybody has a hint for me? Are there any special configuration options
that changed from 1.0.1 to 1.2.0 (nothing found in release notes)?
Or did Canonical some magic?



Debug output in couch.log:
[Fri, 18 May 2012 18:55:35 GMT] [debug] [<0.400.0>] 'GET'
/couch_unit_test_1337367299363_55042/_design/all/_view/byTypeAndId?startkey=%5B%22lens%22%5D&include_docs=true&endkey=%5B%22lens%22,%7B%7D%5D
{1,


                             1} from "127.0.0.1"
Headers: [{'Accept',"text/html, image/gif, image/jpeg, *; q=.2, */*;
q=.2"},
          {'Connection',"keep-alive"},
          {'Host',"localhost:5984"},
          {'User-Agent',"Java/1.6.0_26"}]
[Fri, 18 May 2012 18:55:35 GMT] [debug] [<0.400.0>] OAuth Params:
[{"startkey","[\"lens\"]"},
                                   {"include_docs","true"},
                                   {"endkey","[\"lens\",{}]"}]
[Fri, 18 May 2012 18:55:35 GMT] [debug] [<0.400.0>] request_group
{Pid, Seq} {<0.402.0>,5}
[Fri, 18 May 2012 18:55:35 GMT] [info] [<0.400.0>] 127.0.0.1 - - GET
/couch_unit_test_1337367299363_55042/_design/all/_view/byTypeAndId?startkey=%5B%22lens%22%5D&include_docs=true&endkey=%5B%22lens%22,%7B%7D%5D
200


The map function.
- ------------------------------
function( doc ) {
  var type = doc['@type'];
  var id = doc['_id'];

  if ( type == null || id == null ) {
    return
  }

  emit( [type, id] );
}
- ------------------------------


No other documents are available (returns "total_rows":0



Thanks,

Johannes

- -- 
Johannes Schneider - blog.cedarsoft.com
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