{
  "environment": "disposable-pg16",
  "production_or_staging_latency_proven": false,
  "operational_gate": "blocked",
  "limitations": "Synthetic corpus, local VM, coordinated writer burst; lock_timeout bounds acquisition only. Lock hold upper bound includes acquisition and commit acknowledgement, coordination and observer overhead. Writer timings include instrumentation too. With fewer than 100 repeats, p99 is the observed maximum; groups share the same lock hold. Writer SQL elapsed uses server clocks and includes round-trip submission; it is not a pure lock wait measurement. Server-observed lock wait is reported separately. Small tail sample counts are descriptive only.",
  "cases": [
    {
      "corpus_nodes": 100,
      "server_version_num": "160015",
      "writer_sql_elapsed": {
        "same_memory_nodes": {
          "p50_ms": 119.889,
          "p95_ms": 164.716,
          "p99_ms": 164.716,
          "samples": 3
        },
        "same_memory_edges": {
          "p50_ms": 119.893,
          "p95_ms": 163.938,
          "p99_ms": 163.938,
          "samples": 3
        },
        "other_memory_nodes": {
          "p50_ms": 120.328,
          "p95_ms": 164.442,
          "p99_ms": 164.442,
          "samples": 3
        },
        "other_memory_edges": {
          "p50_ms": 120.42999999999999,
          "p95_ms": 163.988,
          "p99_ms": 163.988,
          "samples": 3
        }
      },
      "writer_lock_wait_lower_bound": {
        "same_memory_nodes": {
          "p50_ms": 114.991,
          "p95_ms": 157.306,
          "p99_ms": 157.306,
          "samples": 3
        },
        "same_memory_edges": {
          "p50_ms": 114.85199999999999,
          "p95_ms": 157.538,
          "p99_ms": 157.538,
          "samples": 3
        },
        "other_memory_nodes": {
          "p50_ms": 114.96199999999999,
          "p95_ms": 157.45999999999998,
          "p99_ms": 157.45999999999998,
          "samples": 3
        },
        "other_memory_edges": {
          "p50_ms": 115.244,
          "p95_ms": 157.411,
          "p99_ms": 157.411,
          "samples": 3
        }
      },
      "lock_hold_upper_bound": {
        "p50_ms": 121.15557797369547,
        "p95_ms": 165.27002700604498,
        "p99_ms": 165.27002700604498,
        "samples": 3
      },
      "trials": [
        {
          "repeat": 0,
          "lock_hold_upper_bound_ms": 165.27002700604498,
          "coordination_overhead_ms": 2.58811900857836,
          "merged": 10,
          "survivors": 90,
          "writers": [
            {
              "tenant": "same",
              "table": "memory_nodes",
              "sql_elapsed_ms": 164.716,
              "observed_lock_wait_lower_bound_ms": 157.306
            },
            {
              "tenant": "same",
              "table": "memory_edges",
              "sql_elapsed_ms": 163.938,
              "observed_lock_wait_lower_bound_ms": 157.538
            },
            {
              "tenant": "other",
              "table": "memory_nodes",
              "sql_elapsed_ms": 164.442,
              "observed_lock_wait_lower_bound_ms": 157.45999999999998
            },
            {
              "tenant": "other",
              "table": "memory_edges",
              "sql_elapsed_ms": 163.988,
              "observed_lock_wait_lower_bound_ms": 157.411
            }
          ]
        },
        {
          "repeat": 1,
          "lock_hold_upper_bound_ms": 121.15557797369547,
          "coordination_overhead_ms": 2.497737994417548,
          "merged": 10,
          "survivors": 90,
          "writers": [
            {
              "tenant": "same",
              "table": "memory_nodes",
              "sql_elapsed_ms": 119.889,
              "observed_lock_wait_lower_bound_ms": 114.991
            },
            {
              "tenant": "same",
              "table": "memory_edges",
              "sql_elapsed_ms": 119.893,
              "observed_lock_wait_lower_bound_ms": 114.85199999999999
            },
            {
              "tenant": "other",
              "table": "memory_nodes",
              "sql_elapsed_ms": 120.328,
              "observed_lock_wait_lower_bound_ms": 114.96199999999999
            },
            {
              "tenant": "other",
              "table": "memory_edges",
              "sql_elapsed_ms": 120.42999999999999,
              "observed_lock_wait_lower_bound_ms": 115.244
            }
          ]
        },
        {
          "repeat": 2,
          "lock_hold_upper_bound_ms": 119.98663598205894,
          "coordination_overhead_ms": 2.2531749855261296,
          "merged": 10,
          "survivors": 90,
          "writers": [
            {
              "tenant": "same",
              "table": "memory_nodes",
              "sql_elapsed_ms": 118.98,
              "observed_lock_wait_lower_bound_ms": 113.33600000000001
            },
            {
              "tenant": "same",
              "table": "memory_edges",
              "sql_elapsed_ms": 119.127,
              "observed_lock_wait_lower_bound_ms": 113.40899999999999
            },
            {
              "tenant": "other",
              "table": "memory_nodes",
              "sql_elapsed_ms": 118.991,
              "observed_lock_wait_lower_bound_ms": 113.72
            },
            {
              "tenant": "other",
              "table": "memory_edges",
              "sql_elapsed_ms": 118.448,
              "observed_lock_wait_lower_bound_ms": 113.08999999999999
            }
          ]
        }
      ]
    },
    {
      "corpus_nodes": 1000,
      "server_version_num": "160015",
      "writer_sql_elapsed": {
        "same_memory_nodes": {
          "p50_ms": 9466.44,
          "p95_ms": 9976.042,
          "p99_ms": 9976.042,
          "samples": 3
        },
        "same_memory_edges": {
          "p50_ms": 9466.23,
          "p95_ms": 9974.411999999998,
          "p99_ms": 9974.411999999998,
          "samples": 3
        },
        "other_memory_nodes": {
          "p50_ms": 9466.791000000001,
          "p95_ms": 9974.432,
          "p99_ms": 9974.432,
          "samples": 3
        },
        "other_memory_edges": {
          "p50_ms": 9466.812,
          "p95_ms": 9974.027,
          "p99_ms": 9974.027,
          "samples": 3
        }
      },
      "writer_lock_wait_lower_bound": {
        "same_memory_nodes": {
          "p50_ms": 9441.107,
          "p95_ms": 9942.263,
          "p99_ms": 9942.263,
          "samples": 3
        },
        "same_memory_edges": {
          "p50_ms": 9441.011,
          "p95_ms": 9942.105,
          "p99_ms": 9942.105,
          "samples": 3
        },
        "other_memory_nodes": {
          "p50_ms": 9441.211,
          "p95_ms": 9942.18,
          "p99_ms": 9942.18,
          "samples": 3
        },
        "other_memory_edges": {
          "p50_ms": 9441.17,
          "p95_ms": 9941.717,
          "p99_ms": 9941.717,
          "samples": 3
        }
      },
      "lock_hold_upper_bound": {
        "p50_ms": 9468.835945008323,
        "p95_ms": 9976.252813998144,
        "p99_ms": 9976.252813998144,
        "samples": 3
      },
      "trials": [
        {
          "repeat": 0,
          "lock_hold_upper_bound_ms": 9976.252813998144,
          "coordination_overhead_ms": 2.3346589878201485,
          "merged": 100,
          "survivors": 900,
          "writers": [
            {
              "tenant": "same",
              "table": "memory_nodes",
              "sql_elapsed_ms": 9976.042,
              "observed_lock_wait_lower_bound_ms": 9942.263
            },
            {
              "tenant": "same",
              "table": "memory_edges",
              "sql_elapsed_ms": 9974.411999999998,
              "observed_lock_wait_lower_bound_ms": 9942.105
            },
            {
              "tenant": "other",
              "table": "memory_nodes",
              "sql_elapsed_ms": 9974.432,
              "observed_lock_wait_lower_bound_ms": 9942.18
            },
            {
              "tenant": "other",
              "table": "memory_edges",
              "sql_elapsed_ms": 9974.027,
              "observed_lock_wait_lower_bound_ms": 9941.717
            }
          ]
        },
        {
          "repeat": 1,
          "lock_hold_upper_bound_ms": 9457.570288010174,
          "coordination_overhead_ms": 2.162953984225169,
          "merged": 100,
          "survivors": 900,
          "writers": [
            {
              "tenant": "same",
              "table": "memory_nodes",
              "sql_elapsed_ms": 9454.931,
              "observed_lock_wait_lower_bound_ms": 9433.373
            },
            {
              "tenant": "same",
              "table": "memory_edges",
              "sql_elapsed_ms": 9455.353000000001,
              "observed_lock_wait_lower_bound_ms": 9433.79
            },
            {
              "tenant": "other",
              "table": "memory_nodes",
              "sql_elapsed_ms": 9455.299,
              "observed_lock_wait_lower_bound_ms": 9433.652
            },
            {
              "tenant": "other",
              "table": "memory_edges",
              "sql_elapsed_ms": 9455.431,
              "observed_lock_wait_lower_bound_ms": 9433.744
            }
          ]
        },
        {
          "repeat": 2,
          "lock_hold_upper_bound_ms": 9468.835945008323,
          "coordination_overhead_ms": 1.8011289939749986,
          "merged": 100,
          "survivors": 900,
          "writers": [
            {
              "tenant": "same",
              "table": "memory_nodes",
              "sql_elapsed_ms": 9466.44,
              "observed_lock_wait_lower_bound_ms": 9441.107
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            {
              "tenant": "same",
              "table": "memory_edges",
              "sql_elapsed_ms": 9466.23,
              "observed_lock_wait_lower_bound_ms": 9441.011
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            {
              "tenant": "other",
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              "observed_lock_wait_lower_bound_ms": 9441.211
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            {
              "tenant": "other",
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          ]
        }
      ]
    }
  ],
  "docker_image_id": "sha256:7b822b0aac60967beb1ea5e576b8602c94c300a157d187f385ae3e0da199b90a"
}