Couchbase Server

memcached set and get latency is slower when erlang async option is switched off, but indexing and querying performance is more consistent

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Blocker Blocker
  • Resolution: Incomplete
  • Affects Version/s: 2.0-beta-2
  • Fix Version/s: 2.0.2
  • Component/s: ns_server, view-engine
  • Security Level: Public
  • Labels:
    None
  • Environment:
    Build 1888
    CentOS 5.8
    4 Nodes
    2 SSD drives

Description

Symptoms:
-- better indexing performance
-- more consistent performance in general
-- 2-3x higher set/get latency
-- higher 80th and 95th percentiles of query latency
-- higher beam.smp memory consumption

Waiting for diags.

Activity

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Pavel Paulau added a comment -
MB-7068
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Pavel Paulau added a comment - MB-7068
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Pavel Paulau added a comment -
With 16 schedulers 80th and 95th percentiles of query latency are even higher.
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Pavel Paulau added a comment - With 16 schedulers 80th and 95th percentiles of query latency are even higher.
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Steve Yen added a comment -
reassigning to Alk as Pavel has no actions on this at the moment.
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Steve Yen added a comment - reassigning to Alk as Pavel has no actions on this at the moment.
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Aleksey Kondratenko added a comment -
This is not strictly speaking a bug. What exactly is wrong/needs-to-be-done ?
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Aleksey Kondratenko added a comment - This is not strictly speaking a bug. What exactly is wrong/needs-to-be-done ?
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Maria McDuff added a comment -
does QE need to run tests for this?
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Maria McDuff added a comment - does QE need to run tests for this?
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Aleksey Kondratenko added a comment -
Answering Maria: no
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Aleksey Kondratenko added a comment - Answering Maria: no
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Maria McDuff added a comment -
pavel, can this be closed now?
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Maria McDuff added a comment - pavel, can this be closed now?
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Pavel Paulau added a comment -
Async threads (+A) were enabled again in 2.0.1, this issue doesn't make sense anymore.
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Pavel Paulau added a comment - Async threads (+A) were enabled again in 2.0.1, this issue doesn't make sense anymore.

People

  • Assignee:
    Pavel Paulau
    Reporter:
    Pavel Paulau
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Dates

  • Created:
    Updated:
    Resolved: