{
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  "evidenceType": "measured-synthetic-workload",
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      "ENABLE_COLUMN_METADATA",
      "ENABLE_DBSTAT_VTAB",
      "ENABLE_FTS3",
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      "ENABLE_RTREE",
      "ENABLE_SESSION",
      "ENABLE_STMTVTAB",
      "ENABLE_UNLOCK_NOTIFY",
      "ENABLE_UPDATE_DELETE_LIMIT",
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      "MAX_EXPR_DEPTH=1000",
      "MAX_FUNCTION_ARG=127",
      "MAX_LENGTH=1000000000",
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      "MAX_PAGE_COUNT=0xfffffffe",
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      "MAX_SCHEMA_RETRY=25",
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    "connections": 2,
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    "schedule": "Sequential API calls, overlapping transaction lifetimes",
    "staleTimeoutsMs": [
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      "integrityCheck": "ok"
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      "initialRead": [
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      "attempts": [
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          "transactionActive": true
        },
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          "code": 517,
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    {
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      "kind": "stale-snapshot",
      "settings": {
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        "wal_autocheckpoint": 0,
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        "read_uncommitted": 0
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          "transactionActive": true
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        {
          "code": 517,
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      "integrityCheck": "ok"
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    {
      "case": "stale-snapshot-250-2",
      "kind": "stale-snapshot",
      "settings": {
        "journal_mode": "wal",
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        "wal_autocheckpoint": 0,
        "busy_timeout": 250,
        "read_uncommitted": 0
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      "initialRead": [
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      "writerCommittedBeforeUpgrade": true,
      "writerRows": [
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      "attempts": [
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          "name": "SQLITE_BUSY_SNAPSHOT",
          "primaryCode": 5,
          "transactionActive": true
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          "name": "SQLITE_BUSY_SNAPSHOT",
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      "finalRows": [
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      "integrityCheck": "ok"
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    {
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        "wal_autocheckpoint": 0,
        "busy_timeout": 0,
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      },
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      "firstRead": [
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        [
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        ],
        [
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          0
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      "integrityCheck": "ok"
    },
    {
      "case": "immediate-writer-0-1",
      "kind": "immediate-writer",
      "settings": {
        "journal_mode": "wal",
        "synchronous": 2,
        "wal_autocheckpoint": 0,
        "busy_timeout": 0,
        "read_uncommitted": 0
      },
      "changedRow": 1,
      "competingWriter": {
        "code": 5,
        "name": "SQLITE_BUSY",
        "primaryCode": 5,
        "transactionActive": false
      },
      "readerDuringWriter": [
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        [
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          0
        ]
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      "finalRows": [
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          11
        ],
        [
          2,
          0
        ]
      ],
      "integrityCheck": "ok"
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  ],
  "limits": [
    "Constructed schedules, not a production frequency estimate or performance benchmark.",
    "No simultaneous API calls, crashes, power losses or I/O faults.",
    "No shared-cache or read_uncommitted configurations are tested.",
    "No claim that BEGIN IMMEDIATE improves throughput; it occupies the writer position earlier.",
    "Installed SQLite is recorded, not a production patch recommendation.",
    "No timing threshold or busy-handler invocation count is measured."
  ],
  "sources": [
    "https://www.sqlite.org/isolation.html",
    "https://www.sqlite.org/rescode.html#busy_snapshot",
    "https://www.sqlite.org/lang_transaction.html"
  ]
}