On 11/08/2015 07:40 PM, Tim Chou wrote:
Hi Adrian, Thank you all the time. I also realized that DBT2 has some bugs. Actually, I have sent an email to DBT2's mailing list. However, no one responded me. The latency of a txn is not high in my test. But the number of txns processed in one minute are not high.
I have not given up getting it to work and will return, hopefully, with some more information.
Thank you. Best. Tim 2015-11-08 22:21 GMT-05:00 Adrian Klaver <adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>>: On 11/08/2015 04:50 PM, Tim Chou wrote: Really CCing list this time. Hi Adrian, Thank you for your reply. I use git to clone the repository (git clone http://git.code.sf.net/p/osdldbt/dbt2 osdldbt-dbt2). DBT2's website I used is http://sourceforge.net/p/osdldbt/dbt2/ci/master/tree I said my performance is very low because I read some papers and their performance can exceed one thousand of transactions per second. I don't want to compare with other databases, but I believe that my performance is too low because only 100+ transactions can be processed. I also try to change the data dir to a ram disk. However, the performance keeps similar. Which version of DBT2 and PostgreSQL do you use to test the performance? I have not actually used DBT2. With the information you provided I downloaded it and tried to get it to run here. So far, ultimately unsuccessful using DBT2 or DBT3. I have gotten as far as the load test(loading the data) but then it fails for one reason or another. This is against 9.4. Going to take a break, maybe someone with more experience using DBT can make suggestions to you. If I have some wrong understandings, please let me know. Thanks, Tim 2015-11-08 17:20 GMT-05:00 Adrian Klaver <adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>>>: On 11/08/2015 01:55 PM, Tim Chou wrote: CCing list. Hi Adrian, The version o Postgres is 9.4.5 I download the DBT2 from their sourceforge website. What site would that be?: When I go here: http://osdldbt.sourceforge.net/ all the tests up to dbt4 download the same tarball which is for dbt1 and is from 2003. When I go here: http://sourceforge.net/projects/osdldbt/files/ the latest version is given as: dbt3-1.10.tar.bz2 I follow the README file to run the test. (First, create and load data. Second, run dbt2-run-workload). In the README for the above I have: "Since this kit is derived from a TPC benchmark specification, TPC Policy on fair-use must be observed: http://www.tpc.org/information/about/documentation/TPC_Policies_v5.13.htm#_Toc124863463 See the QuickStart for a brief introduction on using the kit. " So you will need to provide exact information as what dbt you are using and where it is coming from. Thanks, Tim 2015-11-08 9:45 GMT-05:00 Adrian Klaver <adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>>>>: On 11/07/2015 11:27 PM, Tim Chou wrote: Hi All, When I test the DBT2 with a large number of connections, I always get the error: Error in read.table(file = file, header = header, sep = sep, quote = quote, : no lines available in input Calls: read.csv -> read.table I have tracked the file and see the reason is there are no "TERMINATED" in mix.log. However, in my observation, driver and client do not close elegantly so they cannot quit with sprintf with the "TERMINATED" message (These threads are closed by killall command). 1. How can I solve the problem? (I have checked the bash script and c code. I don't know why each thread cannot exit from the main loop after the predefined time. It should exit the main loop at time xxxx, which is a pre-computed value, according to the code.) 2. I want to know if my performance is too low. No matter how I change the parameters, like creating RAM disk, improving the connection number, I always get the similar results. Here is one of my test results: Hardware: 4-core, 16GB of memory, two disks, and 1Gb ethernet Parameters: 10 warehouses, 30 connections. Response Time (s) Transaction % Average : 90th % Total Rollbacks % ------------ ----- --------------------- ----------- --------------- ----- Delivery 3.00 0.012 : 0.018 7 0 0.00 New Order 41.63 0.006 : 0.008 97 0 0.00 Order Status 5.58 0.003 : 0.004 13 0 0.00 Payment 47.64 0.003 : 0.004 111 0 0.00 Stock Level 2.15 0.005 : 0.007 5 0 0.00 ------------ ----- --------------------- ----------- --------------- ----- 118.78 new-order transactions per minute (NOTPM) 0.8 minute duration 0 total unknown errors 97.0 seconds(s) ramping up It seems only 2 txns/sec. Is that too low? How can I improve the performance? 3. How can I test the performance in distributed mode? Looking forward to your replies. What version of Postgres? Where did get the DBT2 test? How did you run the test? Thanks, Tim -- Adrian Klaver adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>>> -- Adrian Klaver adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>> -- Adrian Klaver adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>
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