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Servlet Engine Performance
The Test
Our test used a Windows NT workload generator implemented in C++. The workload used
WinInet to generate HTTP 1.0 GET transactions. The transactions simply accessed
the "Snoop" servlet provided on all Java servlet engines. All threads worked with no
delay between iterations. Here is a sample command line -
workgen WebModel.dll "GET,http://host/servlet/SnoopServlet,0" 1 5000 out.log
We ran the workload generator on three client machines against two test
servers.
The Machines
Servers
| Server 1 |
Server 2 |
- Dual Intel Pentium II 450 MHz
- 256 MB RAM
- Linux 2.0.36
- Apache 1.3.3
- ApacheJServ 1.0b
- 3Com 3C905 100 Base-T
- Netgear 100 Base-TX Hub
|
- Single AMD K6 200 MHz
- 192 MB RAM
- Windows NT 4.0 SP3
- JWS 1.0.3
- 3Com 3C905 10 Base-T
- Brand X 10 Base-T Hub
|
Clients
| Client 1 |
Client 2 |
Client 3 |
- Dual Intel Pentium II 333 MHz
- 512 MB RAM
- Windows NT 4.0 SP3
- 3Com 3C905 10/100 Base-T
|
- Dual Intel Pentium II 333 MHz
- 256 MB RAM
- Windows NT 4.0 SP3
- 3Com 3C905 10/100 Base-T
|
- Single Intel Pentium II 333 MHz
- 256 MB RAM
- Windows NT 4.0 SP3
- 3Com 3C905 10/100 Base-T
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The Results
Server 1
| Threads/Client |
Client 1 |
Client 2 |
Client 3 |
Cumulative |
| 1 |
1,361 |
1,355 |
1,357 |
4,073 |
| 5 |
1,739 |
1,545 |
596 |
3,880 |
| 10 |
876 |
887 |
397 |
2,160 |
Server 2
| Threads/Client |
Client 1 |
Client 2 |
Client 3 |
Cumulative |
| 1 |
219 |
291 |
239 |
749 |
| 5 |
509 |
533 |
570 |
1,612 |
| 10 |
640 |
599 |
318 |
1,557 |
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Interpretation
We can reach the following conclusion:
1. A well configured Linux/Intel server running Apache can handle 4,073
lightweight servlet transactions per minute.
In plain English, beyond this, we currently have no clue what these numbers mean.
But, we are in hot pursuit of an answer. If you have any ideas about what these numbers might mean, please
let us know!
Sample Workload Generator Execution Log
11/25/98 18:27:07 load library WebModel.dll
11/25/98 18:27:07 initializing model ...
11/25/98 18:27:07 ****************************************
11/25/98 18:27:07 ** The model is initialized and ready **
11/25/98 18:27:07 ** Press any key to begin execution **
11/25/98 18:27:07 ** or press 'q' to quit **
11/25/98 18:27:07 ****************************************
11/25/98 18:27:09 starting threads ...
11/25/98 18:27:09 entering main loop
11/25/98 18:27:09 162 STARTED
11/25/98 18:27:09 206 STARTED
11/25/98 18:27:09 81 STARTED
11/25/98 18:27:09 186 STARTED
11/25/98 18:27:09 226 STARTED
11/25/98 18:27:09 232 STARTED
11/25/98 18:27:09 225 STARTED
11/25/98 18:27:09 222 STARTED
11/25/98 18:27:09 224 STARTED
11/25/98 18:27:09 229 STARTED
11/25/98 18:27:14 TotXact TotMin TotAvg TotMax TotTPM BucXact BucMin BucAvg BucMax BucTPM
11/25/98 18:27:14 -------- -------- -------- -------- -------- -------- -------- -------- -------- --------
11/25/98 18:27:14 146 109 315 1406 1193 146 109 315 1406 1193
11/25/98 18:27:20 288 109 326 5157 1372 142 109 326 5157 1623
11/25/98 18:27:25 412 94 366 5265 1385 124 94 366 5265 1417
11/25/98 18:27:30 502 94 396 5391 1304 90 265 396 5391 1029
11/25/98 18:27:35 561 94 446 5391 1188 59 422 446 5391 674
11/25/98 18:27:41 612 94 510 5687 1093 51 859 510 5687 583
11/25/98 18:27:46 662 94 538 5687 1023 50 687 538 1015 571
11/25/98 18:27:51 709 94 581 6062 965 47 515 581 6062 537
11/25/98 18:27:56 770 94 592 6062 936 61 188 592 5829 697
11/25/98 18:28:02 822 94 627 6062 903 52 328 627 5875 594
11/25/98 18:28:07 882 94 651 6062 884 60 859 651 1125 686
11/25/98 18:28:12 927 94 671 6062 854 45 515 671 1469 514
11/25/98 18:28:17 974 94 690 6390 831 47 796 690 6390 537
11/25/98 18:28:23 1017 94 714 6390 807 43 750 714 6031 491
11/25/98 18:28:28 1064 94 731 6390 790 47 782 731 5781 537
11/25/98 18:28:33 1112 94 743 6390 775 48 109 743 6078 549
11/25/98 18:28:38 1163 94 761 6390 764 51 234 761 5766 583
11/25/98 18:28:44 1213 94 777 6390 753 50 969 777 5484 571
11/25/98 18:28:49 1265 94 782 6390 745 52 265 782 1656 594
11/25/98 18:28:54 1320 94 792 6500 740 55 781 792 6500 629
11/25/98 18:28:59 1366 94 800 6500 730 46 781 800 6047 526
11/25/98 18:29:05 1422 94 806 6500 726 56 219 806 1313 640
11/25/98 18:29:10 1471 94 817 6500 718 49 234 817 5750 560
11/25/98 18:29:15 1519 94 824 6500 712 48 375 824 5922 549
11/25/98 18:29:20 1583 94 827 6500 712 64 344 827 1297 731
11/25/98 18:29:26 1634 94 832 6500 707 51 407 832 1438 583
11/25/98 18:29:31 1681 94 838 6500 701 47 734 838 6031 537
11/25/98 18:29:36 1733 94 845 6500 697 52 859 845 5765 594
11/25/98 18:29:41 1781 94 851 6500 692 48 250 851 1750 549
11/25/98 18:29:47 1831 94 857 6500 688 50 812 857 5859 571
11/25/98 18:29:52 1883 94 860 6500 685 52 282 860 5859 594
11/25/98 18:29:57 1932 94 866 6500 682 49 281 866 5750 560
11/25/98 18:30:02 1982 94 870 6500 678 50 578 870 1235 571
11/25/98 18:30:08 2032 94 872 6500 675 50 797 872 1328 571
11/25/98 18:30:13 2081 94 880 6500 672 49 281 880 5906 560
11/25/98 18:30:18 2132 94 881 6500 669 51 235 881 1968 583
11/25/98 18:30:23 2189 94 886 6500 669 57 718 886 5750 651
11/25/98 18:30:29 2239 94 888 6500 666 50 672 888 5922 571
11/25/98 18:30:34 2294 94 890 6500 665 55 734 890 5734 629
11/25/98 18:30:39 2345 94 891 6500 663 51 844 891 1109 583
11/25/98 18:30:44 2387 94 898 6500 659 42 390 898 6062 480
11/25/98 18:30:50 2437 94 901 6500 657 50 953 901 1219 571
11/25/98 18:30:55 2505 94 900 6500 660 68 297 900 1656 777
11/25/98 18:31:00 2557 94 901 6500 658 52 625 901 5922 594
11/25/98 18:31:05 2613 94 901 6500 658 56 687 901 5766 640
11/25/98 18:31:11 2652 94 907 6500 653 39 281 907 5797 446
11/25/98 18:31:16 2702 94 907 6500 651 50 672 907 1062 571
11/25/98 18:31:19 signalling threads to stop
11/25/98 18:31:19 waiting for threads to terminate ...
11/25/98 18:31:19 226 STOPPED
11/25/98 18:31:19 81 STOPPED
11/25/98 18:31:19 206 STOPPED
11/25/98 18:31:19 229 STOPPED
11/25/98 18:31:19 162 STOPPED
11/25/98 18:31:19 224 STOPPED
11/25/98 18:31:20 225 STOPPED
11/25/98 18:31:21 222 STOPPED
11/25/98 18:31:22 232 STOPPED
11/25/98 18:31:23 186 STOPPED
11/25/98 18:31:23 TotXact TotMin TotAvg TotMax TotTPM BucXact BucMin BucAvg BucMax BucTPM
11/25/98 18:31:23 -------- -------- -------- -------- -------- -------- -------- -------- -------- --------
11/25/98 18:31:23 2733 94 918 6500 640 31 516 918 5891 248
11/25/98 18:31:23 exit.
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