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From Lawrence Pit <lawrence....@gmail.com>
Subject Re: document insert rate
Date Mon, 05 Jan 2009 05:27:47 GMT
Hi,

I tested using CouchDB v0.8 and v0.9, using same machine, same erlang 
host (v5.6.4), and v0.9 is significantly slower. I therefor doubt it has 
to do with this fsync change in erlang v5.6.4

In summary:

CouchDB/0.8.0-incubating : 201 req/sec

CouchDB/0.9.0a731428-incubating : 7.5 req/sec


Below are the full outputs of the two runs I did:

*
Results for **CouchDB/0.8.0-incubating, 201 req/sec :
*
~ > ab -c 10 -n 1000 -p emptypost -T 'application/json'  
http://127.0.0.1:5984/test_suite_db
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        CouchDB/0.8.0-incubating
Server Hostname:        127.0.0.1
Server Port:            5984

Document Path:          /test_suite_db
Document Length:        70 bytes

Concurrency Level:      10
Time taken for tests:   4.967 seconds
Complete requests:      1000
Failed requests:        224
   (Connect: 0, Receive: 0, Length: 224, Exceptions: 0)
Write errors:           0
Total transferred:      274743 bytes
Total POSTed:           208000
HTML transferred:       69743 bytes
Requests per second:    201.35 [#/sec] (mean)
Time per request:       49.666 [ms] (mean)
Time per request:       4.967 [ms] (mean, across all concurrent requests)
Transfer rate:          54.02 [Kbytes/sec] received
                        40.90 kb/s sent
                        94.92 kb/s total

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.4      0       4
Processing:    38   49   7.7     47      98
Waiting:       38   49   7.7     47      98
Total:         38   49   7.7     47      99

Percentage of the requests served within a certain time (ms)
  50%     47
  66%     50
  75%     52
  80%     53
  90%     58
  95%     67
  98%     74
  99%     80
 100%     99 (longest request)



*
Results for CouchDB/0.9.0a731428-incubating, 7.5 req/sec :*


~ > ab -c 10 -n 1000 -p emptypost -T 'application/json'  
http://127.0.0.1:5984/test_suite_db
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        CouchDB/0.9.0a731428-incubating
Server Hostname:        127.0.0.1
Server Port:            5984

Document Path:          /test_suite_db
Document Length:        70 bytes

Concurrency Level:      10
Time taken for tests:   132.048 seconds
Complete requests:      1000
Failed requests:        247
   (Connect: 0, Receive: 0, Length: 247, Exceptions: 0)
Write errors:           0
Total transferred:      281729 bytes
Total POSTed:           208000
HTML transferred:       69729 bytes
Requests per second:    7.57 [#/sec] (mean)
Time per request:       1320.480 [ms] (mean)
Time per request:       132.048 [ms] (mean, across all concurrent requests)
Transfer rate:          2.08 [Kbytes/sec] received
                        1.54 kb/s sent
                        3.62 kb/s total

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.3      0       4
Processing:   422 1314  72.9   1317    1533
Waiting:      422 1314  72.9   1317    1533
Total:        423 1314  72.9   1317    1533

Percentage of the requests served within a certain time (ms)
  50%   1317
  66%   1341
  75%   1350
  80%   1359
  90%   1392
  95%   1415
  98%   1433
  99%   1457
 100%   1533 (longest request)





Cheers,
Lawrence

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