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/**
* Tests the serverStatus and FTDC metrics for multi planner execution (both classic and SBE).
*/
(function() {
"use strict";
function sumHistogramBucketCounts(histogram) {
let sum = 0;
for (const bucket of histogram) {
sum += bucket.count;
}
return sum;
}
load("jstests/libs/ftdc.js");
const collName = jsTestName();
const dbName = jsTestName();
// Use an isolated server instance to obtain predictible serverStatus planning metrics.
const conn = MongoRunner.runMongod({});
assert.neq(conn, null, "mongod failed to start");
const db = conn.getDB(dbName);
let coll = db.getCollection(collName);
coll.drop();
assert.commandWorked(coll.insert({_id: 3, a: 1, b: 1}));
assert.commandWorked(coll.insert({_id: 5, a: 1, b: 1}));
assert.commandWorked(coll.createIndex({a: 1}));
assert.commandWorked(coll.createIndex({b: 1}));
let multiPlannerMetrics = db.serverStatus().metrics.query.multiPlanner;
// Verify initial metrics.
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.classicMicros), 0);
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.classicNumPlans), 0);
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.classicWorks), 0);
assert.eq(multiPlannerMetrics.classicCount, 0);
assert.eq(multiPlannerMetrics.classicMicros, 0);
assert.eq(multiPlannerMetrics.classicWorks, 0);
assert.eq(multiPlannerMetrics.histograms.classicMicros[0].lowerBound, 0);
// Run with classic engine and verify metrics.
{
assert.commandWorked(db.adminCommand({setParameter: 1, internalQueryForceClassicEngine: true}));
assert.commandWorked(coll.find({a: 1, b: 1, c: 1}).explain());
multiPlannerMetrics = db.serverStatus().metrics.query.multiPlanner;
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.sbeMicros), 0);
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.sbeNumReads), 0);
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.sbeNumPlans), 0);
assert.eq(multiPlannerMetrics.sbeMicros, 0);
assert.eq(multiPlannerMetrics.sbeNumReads, 0);
assert.eq(multiPlannerMetrics.sbeCount, 0);
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.classicMicros), 1);
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.classicNumPlans), 1);
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.classicWorks), 1);
assert.eq(multiPlannerMetrics.classicCount, 1);
assert.gt(multiPlannerMetrics.classicMicros, 0);
assert.gt(multiPlannerMetrics.classicWorks, 0);
}
// Run with SBE and verify metrics.
{
assert.commandWorked(
db.adminCommand({setParameter: 1, internalQueryForceClassicEngine: false}));
assert.commandWorked(coll.find({a: 1, b: 1, c: 1}).explain());
multiPlannerMetrics = db.serverStatus().metrics.query.multiPlanner;
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.sbeMicros), 1);
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.sbeNumReads), 1);
assert.eq(sumHistogramBucketCounts(multiPlannerMetrics.histograms.sbeNumPlans), 1);
assert.gt(multiPlannerMetrics.sbeMicros, 0);
assert.gt(multiPlannerMetrics.sbeNumReads, 0);
assert.eq(multiPlannerMetrics.sbeCount, 1);
// Sanity check.
assert.eq(multiPlannerMetrics.classicCount, 1);
}
assert.soon(() => {
// Verify FTDC includes aggregate metrics.
const multiPlannerMetricsFtdc =
verifyGetDiagnosticData(conn.getDB("admin")).serverStatus.metrics.query.multiPlanner;
if (multiPlannerMetricsFtdc.classicCount == 0 || multiPlannerMetricsFtdc.sbeCount == 0) {
// This is an indication we haven't retrieve the expected serverStatus metrics yet.
return false;
}
assert.eq(multiPlannerMetricsFtdc.classicCount, 1);
assert.gt(multiPlannerMetricsFtdc.classicMicros, 0);
assert.gt(multiPlannerMetricsFtdc.classicWorks, 0);
assert.eq(multiPlannerMetricsFtdc.sbeCount, 1);
assert.gt(multiPlannerMetricsFtdc.sbeMicros, 0);
assert.gt(multiPlannerMetricsFtdc.sbeNumReads, 0);
// Verify FTDC omits detailed histograms.
assert(!multiPlannerMetricsFtdc.hasOwnProperty("histograms"));
return true;
}, "FTDC output should eventually reflect observed serverStatus metrics.");
MongoRunner.stopMongod(conn);
}());
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