Explore performance improvement in __wt_txn_id_alloc

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    • Type: Improvement
    • Resolution: Fixed
    • Priority: Major - P3
    • WT3.2.0, 4.1.9
    • Affects Version/s: None
    • Component/s: None
    • None
    • Storage Engines 2019-02-25, Storage Engines 2019-03-11
    • 2

      As analysing the performance of ycsb 100update workload on high performance machines, acquiring a spinlock in __wt_txn_id_alloc can be shown as a latent bottleneck in WiredTiger.

        1. __wt_txn_id_alloc_overhead_portion_ycsb_100update-on-i3.metal.png
          __wt_txn_id_alloc_overhead_portion_ycsb_100update-on-i3.metal.png
          125 kB
        2. __wt_txn_id_alloc_overhead_portion_ycsb_100update-on-M200.png
          __wt_txn_id_alloc_overhead_portion_ycsb_100update-on-M200.png
          144 kB
        3. perf_wtperf-update-only-btree_128thds.i3metal.after-remove-spinlock.png
          perf_wtperf-update-only-btree_128thds.i3metal.after-remove-spinlock.png
          203 kB
        4. perf_wtperf-update-only-btree_128thds.i3metal.before-remove-spinlock.png
          perf_wtperf-update-only-btree_128thds.i3metal.before-remove-spinlock.png
          158 kB
        5. wtperf.update-only-btree.after-wt4571-change.png
          wtperf.update-only-btree.after-wt4571-change.png
          140 kB
        6. wtperf.update-only-btree.different-mutexes.png
          wtperf.update-only-btree.different-mutexes.png
          132 kB

            Assignee:
            Hyeongwon Jang (Inactive)
            Reporter:
            Hyeongwon Jang (Inactive)
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              Created:
              Updated:
              Resolved: