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/**
* Ensure serverStatus reports the total time spent sampling the oplog for all storage engines that
* support OplogStones.
* @tags: [ requires_wiredtiger, requires_persistence ]
*/
(function() {
"use strict";
// Force oplog sampling to occur on start up for small numbers of oplog inserts.
const replSet = new ReplSetTest(
{nodes: 1, nodeOptions: {setParameter: {"maxOplogTruncationPointsDuringStartup": 10}}});
replSet.startSet();
replSet.initiate();
let coll = replSet.getPrimary().getDB("test").getCollection("testcoll");
let res = replSet.getPrimary().getDB("test").serverStatus();
assert.commandWorked(res);
// Small (or empty) oplogs should be processed by scanning.
assert.gt(res.oplogTruncation.totalTimeProcessingMicros, 0);
assert.eq(res.oplogTruncation.processingMethod, "scanning");
// Insert enough documents to force oplog sampling to occur on the following start up.
const maxOplogDocsForScanning = 2000;
for (let i = 0; i < maxOplogDocsForScanning + 1; i++) {
assert.commandWorked(coll.insert({m: 1 + i}));
}
// Restart replica set to load entries from the oplog for sampling.
replSet.stopSet(null /* signal */, true /* forRestart */);
replSet.startSet({restart: true});
res = replSet.getPrimary().getDB("test").serverStatus();
assert.commandWorked(res);
assert.gt(res.oplogTruncation.totalTimeProcessingMicros, 0);
assert.eq(res.oplogTruncation.processingMethod, "sampling");
replSet.stopSet();
})();
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