Couchbase Server

XDC: get latency is ~ 10 times higher on destination nodes

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Blocker Blocker
  • Resolution: Fixed
  • Affects Version/s: None
  • Fix Version/s: 2.0-beta-2
  • Component/s: cross-datacenter-replication
  • Security Level: Public
  • Labels:
  • Environment:
    Virtual and physical machines (4-to-4 nodes, CentOS 5.8), build 1701.

Description

Test specification:
xperf-mixed-1-uni/xperf-read-1-uni
https://docs.google.com/spreadsheet/ccc?key=0AgLUessE73UXdHdrVGZoRDVwY1pEOW84TDFIM1k0TUE#gid=0

-- 1.7 ms vs. 24.6 ms (90th percentile, VMs).
-- 0.75ms vs. 6.17 ms (90th percentile, physical machines)

Yammer conversation:
https://www.yammer.com/couchbase.com/#/Threads/show?threadId=211301672

Activity

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Sharon Barr added a comment -
I believe it is due to the high CPU usage on the destination. Damien is working on it.
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Sharon Barr added a comment - I believe it is due to the high CPU usage on the destination. Damien is working on it.
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Junyi Xie added a comment -
Talked to Damien yesterday, there are a few improvement we can do on destination side, I am now working on that.
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Junyi Xie added a comment - Talked to Damien yesterday, there are a few improvement we can do on destination side, I am now working on that.
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Junyi Xie added a comment -
http://review.membase.org/#/c/20768/
http://review.couchbase.org/#/c/20810/
http://review.couchbase.org/#/c/20868/
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Junyi Xie added a comment - http://review.membase.org/#/c/20768/ http://review.couchbase.org/#/c/20810/ http://review.couchbase.org/#/c/20868/
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Thuan Nguyen added a comment -
Integrated in github-ns-server-2-0 #468 (See [http://qa.hq.northscale.net/job/github-ns-server-2-0/468/])
    MB-6619: remove unnecessary stats polling in ensure_fulll_commit (Revision 5d443e20df6d464f69d5a94b32ea5feaf2ef3945)

     Result = SUCCESS
pwansch :
Files :
* src/ns_config_default.erl
* src/capi_frontend.erl
* src/mc_connection.erl
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Thuan Nguyen added a comment - Integrated in github-ns-server-2-0 #468 (See [ http://qa.hq.northscale.net/job/github-ns-server-2-0/468/ ])      MB-6619 : remove unnecessary stats polling in ensure_fulll_commit (Revision 5d443e20df6d464f69d5a94b32ea5feaf2ef3945)      Result = SUCCESS pwansch : Files : * src/ns_config_default.erl * src/capi_frontend.erl * src/mc_connection.erl
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Pavel Paulau added a comment -
Verified.
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Pavel Paulau added a comment - Verified.

People

  • Assignee:
    Junyi Xie
    Reporter:
    Pavel Paulau
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Dates

  • Created:
    Updated:
    Resolved: