[MB-44827] Very Slow SELECT_BUCKET operations - Couchbase database

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Details

Type: Bug
Status: Closed
Priority: Critical
Resolution: Fixed
Affects Version/s: Cheshire-Cat
Fix Version/s: 7.0.0
Component/s: memcached
Labels:
None

Triage:
Triaged
Story Points:
1
Is this a Regression?:
Yes
Sprint:
KV-Engine 2021-March

Description

This is a spin-off ticket from ~~MB-44024~~, where timeouts are being seen from the SDK.
Looking at KV we can see some very slow SELECT_BUCKET operations.

These should be fast..

Attachments

Issue Links

relates to

MB-44024 Timer creation failure due to LCB_ERR_TIMEOUT (201)

Closed

MB-45125 SDK KV Write operations may timeout with default timeout of 2.5secs

Closed

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View 5 older comments

Couchbase Build Team added a comment - 18/Mar/21 8:33 AM

Build couchbase-server-7.0.0-4728 contains kv_engine commit ce80706 with commit message:
~~MB-44827~~: Add more fine grained probes for bucket association

Couchbase Build Team added a comment - 18/Mar/21 8:33 AM Build couchbase-server-7.0.0-4728 contains kv_engine commit ce80706 with commit message: MB-44827 : Add more fine grained probes for bucket association

Couchbase Build Team added a comment - 18/Mar/21 10:34 AM

Build couchbase-server-7.0.0-4729 contains kv_engine commit d0a545a with commit message:
~~MB-44827~~: Don't hold the bucket lock during bucketsForEach

Couchbase Build Team added a comment - 18/Mar/21 10:34 AM Build couchbase-server-7.0.0-4729 contains kv_engine commit d0a545a with commit message: MB-44827 : Don't hold the bucket lock during bucketsForEach

Couchbase Build Team added a comment - 18/Mar/21 10:34 AM

Build couchbase-server-7.0.0-4729 contains kv_engine commit 7523e7a with commit message:
~~MB-44827~~: Refactor: make bucket.clients atomic

Couchbase Build Team added a comment - 18/Mar/21 10:34 AM Build couchbase-server-7.0.0-4729 contains kv_engine commit 7523e7a with commit message: MB-44827 : Refactor: make bucket.clients atomic

Trond Norbye added a comment - 18/Mar/21 9:38 PM

Reran the test and no slow select buckets was reported (now with a lower threshold)

Trond Norbye added a comment - 18/Mar/21 9:38 PM Reran the test and no slow select buckets was reported (now with a lower threshold)

Couchbase Build Team added a comment - 19/Mar/21 2:44 AM

Build couchbase-server-7.0.0-4735 contains kv_engine commit f0f8164 with commit message:
~~MB-44827~~: Remove temporarily forced trace probes

Couchbase Build Team added a comment - 19/Mar/21 2:44 AM Build couchbase-server-7.0.0-4735 contains kv_engine commit f0f8164 with commit message: MB-44827 : Remove temporarily forced trace probes