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Initial chunk load, which requires a table scan, is 1.1 seconds:
2016-10-24T16:18:01.297+0000 I SHARDING [Balancer] ChunkManager: time to load chunks for buildlogs.logs: 1133ms sequenceNumber: 2 version: 157970|1||576339e709168e06c8eb8097 base
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Subsequent refreshes, which require a very fast query (0 ms) still take over 250ms:
2016-10-24T16:33:41.683+0000 I SHARDING [Balancer] ChunkManager: time to load chunks for buildlogs.logs: 264ms sequenceNumber: 3 version: 157970|4||576339e709168e06c8eb8097 based
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This issue is to investigate the issue.
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