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From tpeyrard <>
Subject [GitHub] jmeter pull request #211: Measure Time to First byte in JDBCSampler
Date Fri, 24 Jun 2016 15:36:46 GMT
GitHub user tpeyrard opened a pull request:

    Measure Time to First byte in JDBCSampler

    I use JMeter to measure performance of a database. When executing queries returning a
lot of rows, the time taken by JMeter to read the ResultSet and storing the result in a StringBuilder
then calling toString() might be bigger than the execution time on the server.
    In order to easily understand what's taking time for slow queries, I thought it might
be interesting to use "Latency" and "Connect Time" of the SampleResult to show two informations:
    - **Connect time**: time needed to establish the connection (previously it was in the
    - **Latency**: time taken to get the first ResultSet (TTFB) (or whatever if it's a statement
returning something else)
    What do you think of that change?

You can merge this pull request into a Git repository by running:

    $ git pull jdbc

Alternatively you can review and apply these changes as the patch at:

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #211
commit 2ea7107744fabcd242ea77f5ff91e46487b1407d
Author: Thomas Peyrard <>
Date:   2016-06-24T15:28:23Z

    In order to measure time to first byte for JDBC sampler:
    - Use connect time to instead of latency to measure connection time
    - Use latency to measure the time at which the first ResultSet (or whatever) is received
from the connection


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