Details
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Bug
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Resolution: Done
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Critical - P2
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2.8.0-rc4
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Fully Compatible
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ALL
Description
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
|
|
|
...
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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) {
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db.createCollection("c", {capped: true, size: size})
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}
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function insert(count) {
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var every = 10000
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var bulk = db.c.initializeUnorderedBulkOp();
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var t = new Date()
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for (var i=0; i<=count; i++) {
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if (i>0 && i%every==0) {
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bulk.execute();
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bulk = db.c.initializeUnorderedBulkOp();
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tt = new Date()
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print(i, Math.floor(every / (tt-t) * 1000))
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t = tt
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}
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bulk.insert({})
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}
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}
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create(10000000)
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insert(100000000)
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Attachments
Issue Links
- is related to
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SERVER-16235 Performance issue in capped collections under WiredTiger
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- Closed
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- links to