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Type:
Bug
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Resolution: Done
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Priority:
Critical - P2
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Affects Version/s: 2.8.0-rc4
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Component/s: Performance, Storage
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Labels:
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Fully Compatible
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ALL
Seeing steady and continual drop in insert performance in capped collections. Using https://github.com/mongodb/mongo/commit/8197195ce0faee1df316b2b45649cbc61dcf3ec8
Starting at 40k inserts/second and dropping to 16k inserts/second over 15 minutes
10000 40322 20000 41152 30000 40000 40000 41152 50000 41152 60000 40322 70000 40983 80000 40000 90000 40983 100000 39525 110000 40816 120000 40816 130000 40000 140000 40816 150000 40000 160000 40983 170000 39370 180000 40322 190000 40650 200000 40322 210000 40983 220000 39682 230000 40160 240000 40983 ... 15720000 19011 15730000 18903 15740000 19047 15750000 18552 15760000 18867 15770000 19047 15780000 19047 15790000 19011 15800000 19120 15810000 18656 15820000 18975 15830000 18939 15840000 19011 15850000 19083 15860000 18726 15870000 18903 15880000 18656 15890000 18975 15900000 19047 15910000 18832 15920000 18975 15930000 15625
function create(size) {
db.createCollection("c", {capped: true, size: size})
}
function insert(count) {
var every = 10000
var bulk = db.c.initializeUnorderedBulkOp();
var t = new Date()
for (var i=0; i<=count; i++) {
if (i>0 && i%every==0) {
bulk.execute();
bulk = db.c.initializeUnorderedBulkOp();
tt = new Date()
print(i, Math.floor(every / (tt-t) * 1000))
t = tt
}
bulk.insert({})
}
}
create(10000000)
insert(100000000)
- is related to
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- Closed
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- links to