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// @tags: [requires_fast_memory]
var col = db.memoryTest;
var buildInfo = assert.commandWorked(db.adminCommand("buildInfo"));
var serverStatus = assert.commandWorked(db.adminCommand("serverStatus"));
// If mongod was compiled with the code coverage flag, then we reduce the length of some of the
// tests as they take an excessive amount of time. If the mongod is running with an in-memory
// storage engine, then we reduce the length of some of the tests to avoid an OOM due to the number
// of documents inserted.
var codeCoverageVariant = buildInfo.buildEnvironment.ccflags.includes("-ftest-coverage");
var inMemoryStorageEngine = !serverStatus.storageEngine.persistent;
var reduceNumLoops = codeCoverageVariant || inMemoryStorageEngine;
// test creating many collections to make sure no internal cache goes OOM
var loopNum = reduceNumLoops ? 100 : 10000;
for (var i = 0; i < loopNum; ++i) {
name = "memoryTest" + i;
if ((i % 1000) == 0)
print("Processing " + name);
for (var j = 0; j < 100; ++j) {
db[name + "_" + j].find();
}
}
// do mix of calls to make sure OOM is handled with no permanent damage
function doWhereTest(count) {
'use strict';
print('doWhereTest(' + count + ')');
const coll = db.whereCol;
coll.drop();
coll.insert({a: 1});
coll.findOne({$where: "var arr = []; for (var i = 0; i < " + count + "; ++i) {arr.push(0);}"});
}
function assertMemoryError(func) {
try {
func();
} catch (e) {
if (e.message.includes('"errmsg" : "Out of memory"')) {
return;
}
throw e;
}
throw new Error("did not throw exception");
}
doWhereTest(10);
assertMemoryError(function() {
doWhereTest(1000000000);
});
doWhereTest(10);
assertMemoryError(function() {
doWhereTest(1000000000);
});
loopNum = reduceNumLoops ? 10000 : 1000000;
doWhereTest(loopNum);
doWhereTest(loopNum);
doWhereTest(loopNum);
assertMemoryError(function() {
doWhereTest(1000000000);
});
doWhereTest(10);
doWhereTest(loopNum);
doWhereTest(loopNum);
doWhereTest(loopNum);
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