Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-18562

YCSB load phase (insert only) push 16 core machine to 100 % due to high resoultion timers

    XMLWordPrintable

Details

    • Bug
    • Status: Closed
    • Critical - P2
    • Resolution: Gone away
    • 3.1.3
    • None
    • Internal Code
    • Windows
    • Platform 6 07/17/15, Platform 7 08/10/15

    Description

      MongoDB shell version: 3.1.3-pre-

      Environment:

      • Single mongod with wiredtiger as storage engine
      • Windows 2012
      • WriedTiger default configuration
      • EC2 machine c3.4xlarge

      Workload:

      • Used YCSB load

      Issue -

      During insert only workload it's appear that high resolution counter which responsible to notify if operation take longer then X (100msec default) consume 60% of the CPU

      The impact is so big that it mask the different between SSD drive to spin disk on windows.

      Attachments

        Issue Links

          depends on

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-18922 Choose time source for measuring short durations dynamically at startup

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-17630 Insert only workload under stress - high resolution timer for query operations consume ~17% of execution time

          • Critical - P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-4740 Use monotonic clock sources for Timer

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-18613 We can double the WiredTiger YCSB load throughput on windows by eliminate the expensive timer operations

          • Critical - P2 - Crashes, loss of data, severe memory leak.
          • Closed

          Activity

            People

              backlog-server-platform DO NOT USE - Backlog - Platform Team
              eitan.klein Eitan Klein
              Votes:
              1 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: