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[xmlblaster] Durable QoS performance
Hi,
I've been running some rough'n'ready benchmarks over xmlBlaster. With
volatile messages, I get a maximum throughput of about 360 messages per
second. When I change the QoS to durable, the maximum throughput drops to 5
messages per second. The performance monitor says that I'm using <5% CPU and
only transferring 30K/s to disks. I'm used to persistent messaging being
disk bound at about 50-100 mps for other MOM, so this seems a little on the
low side. The tests are not tuned at all, except for
-Dsession.maxSessions=10000 set in the server. Otherwise, everything is as
it is out of the box.
Can anyone suggest any obvious stupidities?
I'm using xmlBlaster 0.79f with the Sun 1.3.1 HotSpot JVM (as supplied with
JBuilder 6). The system I'm running on is a Dell Precision 620: 2x900 MHz
processors, 1Gb memory, 9Gb SCSI disk, Win2k Server SP2. The benchmarks
start a number of senders which send 4k messages to a single subscriber on a
single subject. The server and client are running on the same machine. While
the performance figures aren't the 600-odd mps given on the web page, there
are plenty of reasons for that, starting with the JVM.
Some results below. Columns are message size, demand (how many messages per
second total I'm trying to send) number of senders/publishers, number of
receivers/subscribers, number of keys, run time (ms), number of messages
sent, number received, sender throughput in messages per second, receiver
throughput in messages per second.
Simple throughput, non-durable
CPU multitheaded ~10% for 20mps, 20% for 100mps, 40% for 200mps, 80% for
500mps, 80% for 1000mps, flattens at 80%
Size Deman Sders Rcvrs Keys Time Sent Rcvd Sent
Received
4096 10 10 1 1 119984 1200 1200 10 10
4096 20 10 1 1 119983 2400 2401 20 20
4096 50 10 1 1 120000 6000 6001 50 50
4096 100 10 1 1 120030 11999 12000 100 100
4096 200 10 1 1 119984 23981 23982 200 200
4096 500 10 1 1 119984 42868 42869 357 357
4096 1000 10 1 1 119984 43865 43866 366 366
4096 2000 10 1 1 119984 44026 44027 367 367
Simple throughput, durable
< 5% CPU disk: ~5 transfers/s, ~5% disk time, ~30K/s
Size Deman Sders Rcvrs Keys Time Sent Rcvd Sent
Received
4096 10 10 1 1 120093 642 643 5 5
4096 20 10 1 1 120000 643 644 5 5
4096 50 10 1 1 119984 642 643 5 5
4096 100 10 1 1 119984 644 645 5 5
4096 200 10 1 1 120000 642 643 5 5
4096 500 10 1 1 119984 642 643 5 5
Increase number of subscribers, non-durable
Size Deman Sders Rcvrs Keys Time Sent Rcvd Sent
Received
4096 100 10 1 1 120031 12000 12001 100 100
4096 100 10 2 1 119999 12000 23600 100 197
4096 100 10 5 1 120030 12000 58483 100 487
4096 100 10 10 1 119999 8443 81919 70 683
4096 100 10 20 1 120030 3669 68499 31 571
4096 100 10 50 1 120030 1516 66148 13 551
4096 100 10 100 1 120030 982 84889 8 707
--
Doug.Palmer at csiro.au
CSIRO Mathematical and Information Sciences
GPO Box 664 tel: +61 2 6216 7061
Canberra ACT 2601, Australia fax: +61 2 6216 7111