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  1. WiredTiger
  2. WT-2453

Throughput drop in wtperf evict Jenkins tests

          Details

          • Type: Bug
          • Status: Closed
          • Priority: Major - P3
          • Resolution: Fixed
          • Affects Version/s: None
          • Fix Version/s: WT2.9.0
          • Labels:

            Description

            A recent change to Jenkins led to an unexpected throughput drop in the wtperf evict jobs in Jenkins. The regression was introduced by: http://build.wiredtiger.com:8080/job/wiredtiger-perf-evict/495/

            That is adding in more eviction worker threads to the wtperf configuration files. Which was related to WT-2432.

            Testing with more eviction worker threads is more interesting that testing a single eviction worker - so it is worthwhile understanding the source of the difference.

              Attachments

              1. dev-vs-wt-2453-24-cores.png
                dev-vs-wt-2453-24-cores.png
                46 kB
              2. dev-vs-wt-2453-4-cores.png
                dev-vs-wt-2453-4-cores.png
                43 kB
              3. ev4workers.jpg
                ev4workers.jpg
                61 kB
              4. evict1profile.jpg
                evict1profile.jpg
                17 kB
              5. evict4profile.jpg
                evict4profile.jpg
                18 kB
              6. treewalk.jpg
                treewalk.jpg
                49 kB

                Issue Links

                is depended on by

                Bug - A problem which impairs or prevents the functions of the product. SERVER-22834 1.7x performance regression in random queries

                • Major - P3 - Major loss of function.
                • Closed
                is duplicated by

                Improvement - An improvement or enhancement to an existing feature or task. WT-2511 Recent WT builds have a large perf regression as thread count increases in read only workloads larger than cache

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

                Improvement - An improvement or enhancement to an existing feature or task. WT-2545 Investigate eviction tree walk

                • Major - P3 - Major loss of function.
                • Resolved

                Improvement - An improvement or enhancement to an existing feature or task. WT-2544 Fix eviction statistics when clear is configured

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

                Improvement - An improvement or enhancement to an existing feature or task. WT-2546 Eviction server not help evict pages sometimes

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

                  Activity

                    People

                    • Assignee:
                      sue.loverso Sue LoVerso
                      Reporter:
                      alexander.gorrod Alexander Gorrod
                    • Votes:
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                      5 Start watching this issue

                      Dates

                      • Created:
                        Updated:
                        Resolved: