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Type:
Bug
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Resolution: Duplicate
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Priority:
Major - P3
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None
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Affects Version/s: 2.6.8, 3.0.1
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Component/s: Index Maintenance, Querying
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None
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Environment:Ubuntu 14.04.2 LTS 64bit
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Linux
Hello.
I Have 20 nodes in cluster. Sometimes random node freeze due to begin use wrong indexe for query.
Example:
2015-03-20T15:23:01.646+0100 I QUERY [conn2572] query goods.events query: { $query: { gt: ObjectId('53216161688fcfc9fed24755'), act: "attr", lang: "RU", ta : "name", st: 1 }, $readPreference: { mode: "nearest" } } planSummary: IXSCAN { act: 1, c: -1 } ntoskip:0 nscanned:36885811 nscannedObjects:36885811 keyUpdate s:0 writeConflicts:0 numYields:295880 nreturned:1 reslen:382 locks:{} 29456ms
Usually this query use "gt_act_lang_ta" index.
events0003:PRIMARY> db.getSiblingDB('goods').getCollection('events').getIndexes() [ { "v" : 1, "key" : { "_id" : 1 }, "name" : "_id_", "ns" : "goods.events" }, { "v" : 1, "key" : { "u" : -1 }, "name" : "updated", "ns" : "goods.events", "background" : true }, { "v" : 1, "key" : { "tn" : 1 }, "name" : "tn", "ns" : "goods.events", "background" : true }, { "v" : 1, "key" : { "c" : -1 }, "name" : "created", "ns" : "goods.events", "background" : false }, { "v" : 1, "key" : { "t" : 1, "c" : -1 }, "name" : "type_create", "ns" : "goods.events", "background" : true }, { "v" : 1, "key" : { "act" : 1, "c" : -1 }, "name" : "act_create", "ns" : "goods.events", "background" : true }, { "v" : 1, "key" : { "ut" : 1, "act" : 1, "u" : 1 }, "name" : "ut_act_u", "ns" : "goods.events", "background" : true }, { "v" : 1, "key" : { "ntfy" : 1 }, "name" : "ntfy_1", "ns" : "goods.events", "sparse" : true }, { "v" : 1, "key" : { "ut2" : 1, "act" : 1, "u" : -1 }, "name" : "ut2_1_act_1_u_-1", "ns" : "goods.events", "sparse" : true }, { "v" : 1, "key" : { "gt" : 1, "act" : 1, "lang" : 1, "ta" : 1 }, "name" : "gt_act_lang_ta", "ns" : "goods.events", "background" : true }, { "v" : 1, "key" : { "act" : 1, "ta" : 1, "c" : 1 }, "name" : "act_ta_c", "ns" : "goods.events", "background" : true }, { "v" : 1, "key" : { "exist" : 1, "act" : 1, "ut" : 1 }, "name" : "exist_act_ut", "ns" : "goods.events", "background" : true }, { "v" : 1, "key" : { "ut" : 1, "u" : 1 }, "name" : "ut_u", "ns" : "goods.events", "background" : true }, { "v" : 1, "unique" : true, "key" : { "gt" : 1, "ut" : 1, "act" : 1, "ta" : 1, "lang" : 1 }, "name" : "gt_1_ut_1_act_1_ta_1_lang_1", "ns" : "goods.events", "background" : true }, { "v" : 1, "key" : { "gt" : 1, "act" : 1, "geo" : "2dsphere" }, "name" : "gt_1_act_1_geo_2dsphere", "ns" : "goods.events", "sparse" : true, "background" : true, "2dsphereIndexVersion" : 2 } ]
- duplicates
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SERVER-15225 CachedPlanStage should execute for trial period and re-plan if query performs poorly
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- Closed
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