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/**
* Test that the memory usage of validate is properly limited according to the
* maxValidateMemoryUsageMB parameter.
*
* @tags: [
* requires_persistence,
* requires_wiredtiger,
* ]
*/
(function() {
"use strict";
load("jstests/disk/libs/wt_file_helper.js");
const kIndexKeyLength = 1024 * 1024;
const baseName = "validate_memory_limit";
const dbpath = MongoRunner.dataPath + baseName + "/";
let conn = MongoRunner.runMongod({dbpath: dbpath});
let coll = conn.getDB("test").getCollection("corrupt");
function corruptIndex() {
const uri = getUriForIndex(coll, "_id_");
conn = truncateUriAndRestartMongod(uri, conn);
coll = conn.getDB("test").getCollection("corrupt");
}
function checkValidate(errorPrefix, numMissingIndexEntries) {
conn.getDB("test").adminCommand({setParameter: 1, maxValidateMemoryUsageMB: 1});
const res = coll.validate();
assert.commandWorked(res);
assert(!res.valid);
assert.containsPrefix(errorPrefix, res.errors);
assert.eq(res.missingIndexEntries.length, numMissingIndexEntries);
}
function checkValidateRepair(expectRepair) {
const res = coll.validate({repair: true});
assert.commandWorked(res);
assert(!res.valid, printjson(res));
assert.eq(res.repaired, expectRepair, printjson(res));
}
const noneReportedPrefix =
"Unable to report index entry inconsistencies due to memory limitations.";
const notAllReportedPrefix =
"Not all index entry inconsistencies are reported due to memory limitations.";
// Insert a document with a key larger than maxValidateMemoryUsageMB so that validate does not
// report any missing index entries.
const indexKey = "a".repeat(kIndexKeyLength);
assert.commandWorked(coll.insert({_id: indexKey}));
corruptIndex();
checkValidate(noneReportedPrefix, 0);
// Can't repair successfully if there aren't any index inconsistencies reported.
checkValidateRepair(false);
// Insert a document with a small key so that validate reports one missing index entry.
assert.commandWorked(coll.insert({_id: 1}));
corruptIndex();
checkValidate(notAllReportedPrefix, 1);
// Repair, but incompletely if only some inconsistencies are reported.
checkValidateRepair(true);
MongoRunner.stopMongod(conn, null, {skipValidation: true});
})();
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