[jira] [Commented] (COUCHDB-3284) 8Kb read-ahead in couch_file causes extra IO and binary memory usage

2017-03-01 Thread ASF subversion and git services (JIRA) 

[ 
https://issues.apache.org/jira/browse/COUCHDB-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15890514#comment-15890514
 ] 

ASF subversion and git services commented on COUCHDB-3284:
--

Commit bf12a7a3336bd438493e7db1d090160f1c1a09f3 in couchdb-couch's branch 
refs/heads/2971-count-distinct from [~vatamane]
[ https://git-wip-us.apache.org/repos/asf?p=couchdb-couch.git;h=bf12a7a ]

Remove dead code from couch_file

This code was left over after removing 8kB read-ahead

https://github.com/apache/couchdb-couch/pull/223/commits/d52a5335d930d11ade4953c8576d22f55872ff6f

COUCHDB-3284


> 8Kb read-ahead in couch_file causes extra IO and binary memory usage
> 
>
> Key: COUCHDB-3284
> URL: https://issues.apache.org/jira/browse/COUCHDB-3284
> Project: CouchDB
>  Issue Type: Bug
>  Components: Database Core
>Affects Versions: 2.0.0
>Reporter: Nick Vatamaniuc
> Attachments: jira_io_increased.png
>
>
> 8Kb read-ahead logic in couch_file seems to cause extra input IO thrashing, 
> binary memory usage but doesn't speed-up



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[jira] [Commented] (COUCHDB-3284) 8Kb read-ahead in couch_file causes extra IO and binary memory usage

2017-02-01 Thread ASF subversion and git services (JIRA) 

[ 
https://issues.apache.org/jira/browse/COUCHDB-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15848857#comment-15848857
 ] 

ASF subversion and git services commented on COUCHDB-3284:
--

Commit c644280554aba00055886602fba39ad058306d7e in couchdb's branch 
refs/heads/master from [~vatamane]
[ https://git-wip-us.apache.org/repos/asf?p=couchdb.git;h=c644280 ]

Bump couch dependency. Remove dead code in couch_file.

COUCHDB-3284


> 8Kb read-ahead in couch_file causes extra IO and binary memory usage
> 
>
> Key: COUCHDB-3284
> URL: https://issues.apache.org/jira/browse/COUCHDB-3284
> Project: CouchDB
>  Issue Type: Bug
>  Components: Database Core
>Affects Versions: 2.0.0
>Reporter: Nick Vatamaniuc
> Attachments: jira_io_increased.png
>
>
> 8Kb read-ahead logic in couch_file seems to cause extra input IO thrashing, 
> binary memory usage but doesn't speed-up



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[jira] [Commented] (COUCHDB-3284) 8Kb read-ahead in couch_file causes extra IO and binary memory usage

2017-02-01 Thread ASF subversion and git services (JIRA) 

[ 
https://issues.apache.org/jira/browse/COUCHDB-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15848851#comment-15848851
 ] 

ASF subversion and git services commented on COUCHDB-3284:
--

Commit bf12a7a3336bd438493e7db1d090160f1c1a09f3 in couchdb-couch's branch 
refs/heads/master from [~vatamane]
[ https://git-wip-us.apache.org/repos/asf?p=couchdb-couch.git;h=bf12a7a ]

Remove dead code from couch_file

This code was left over after removing 8kB read-ahead

https://github.com/apache/couchdb-couch/pull/223/commits/d52a5335d930d11ade4953c8576d22f55872ff6f

COUCHDB-3284


> 8Kb read-ahead in couch_file causes extra IO and binary memory usage
> 
>
> Key: COUCHDB-3284
> URL: https://issues.apache.org/jira/browse/COUCHDB-3284
> Project: CouchDB
>  Issue Type: Bug
>  Components: Database Core
>Affects Versions: 2.0.0
>Reporter: Nick Vatamaniuc
> Attachments: jira_io_increased.png
>
>
> 8Kb read-ahead logic in couch_file seems to cause extra input IO thrashing, 
> binary memory usage but doesn't speed-up



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[jira] [Commented] (COUCHDB-3284) 8Kb read-ahead in couch_file causes extra IO and binary memory usage

2017-02-01 Thread ASF GitHub Bot (JIRA) 

[ 
https://issues.apache.org/jira/browse/COUCHDB-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15848852#comment-15848852
 ] 

ASF GitHub Bot commented on COUCHDB-3284:
-

Github user asfgit closed the pull request at:

https://github.com/apache/couchdb-couch/pull/225


> 8Kb read-ahead in couch_file causes extra IO and binary memory usage
> 
>
> Key: COUCHDB-3284
> URL: https://issues.apache.org/jira/browse/COUCHDB-3284
> Project: CouchDB
>  Issue Type: Bug
>  Components: Database Core
>Affects Versions: 2.0.0
>Reporter: Nick Vatamaniuc
> Attachments: jira_io_increased.png
>
>
> 8Kb read-ahead logic in couch_file seems to cause extra input IO thrashing, 
> binary memory usage but doesn't speed-up



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[jira] [Commented] (COUCHDB-3284) 8Kb read-ahead in couch_file causes extra IO and binary memory usage

2017-02-01 Thread ASF GitHub Bot (JIRA) 

[ 
https://issues.apache.org/jira/browse/COUCHDB-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15848848#comment-15848848
 ] 

ASF GitHub Bot commented on COUCHDB-3284:
-

GitHub user nickva opened a pull request:

https://github.com/apache/couchdb-couch/pull/225

Remove dead code from couch_file

This code was left over after removing 8kB read-ahead


https://github.com/apache/couchdb-couch/pull/223/commits/d52a5335d930d11ade4953c8576d22f55872ff6f

COUCHDB-3284

You can merge this pull request into a Git repository by running:

$ git pull https://github.com/cloudant/couchdb-couch 
couchdb-3284-remove-dead-code

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/couchdb-couch/pull/225.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

This closes #225


commit bf12a7a3336bd438493e7db1d090160f1c1a09f3
Author: Nick Vatamaniuc 
Date:   2017-02-01T19:42:59Z

Remove dead code from couch_file

This code was left over after removing 8kB read-ahead


https://github.com/apache/couchdb-couch/pull/223/commits/d52a5335d930d11ade4953c8576d22f55872ff6f

COUCHDB-3284




> 8Kb read-ahead in couch_file causes extra IO and binary memory usage
> 
>
> Key: COUCHDB-3284
> URL: https://issues.apache.org/jira/browse/COUCHDB-3284
> Project: CouchDB
>  Issue Type: Bug
>  Components: Database Core
>Affects Versions: 2.0.0
>Reporter: Nick Vatamaniuc
> Attachments: jira_io_increased.png
>
>
> 8Kb read-ahead logic in couch_file seems to cause extra input IO thrashing, 
> binary memory usage but doesn't speed-up



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[jira] [Commented] (COUCHDB-3284) 8Kb read-ahead in couch_file causes extra IO and binary memory usage

2017-01-27 Thread ASF GitHub Bot (JIRA) 

[ 
https://issues.apache.org/jira/browse/COUCHDB-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15843544#comment-15843544
 ] 

ASF GitHub Bot commented on COUCHDB-3284:
-

GitHub user nickva opened a pull request:

https://github.com/apache/couchdb-couch/pull/223

Remove 8kB read-ahead from couch_file

In production it showed an increased input Erlang IO and increased binary
memory usage.

See attached file in Jira ticket:

COUCHDB-3284

You can merge this pull request into a Git repository by running:

$ git pull https://github.com/cloudant/couchdb-couch couchdb-3284

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/couchdb-couch/pull/223.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

This closes #223


commit d52a5335d930d11ade4953c8576d22f55872ff6f
Author: Nick Vatamaniuc 
Date:   2017-01-27T17:04:01Z

Remove 8kB read-ahead from couch_file

In production it showed an increased input Erlang IO and increased binary
memory usage.

See attached file in Jira ticket:

COUCHDB-3284




> 8Kb read-ahead in couch_file causes extra IO and binary memory usage
> 
>
> Key: COUCHDB-3284
> URL: https://issues.apache.org/jira/browse/COUCHDB-3284
> Project: CouchDB
>  Issue Type: Bug
>  Components: Database Core
>Affects Versions: 2.0.0
>Reporter: Nick Vatamaniuc
> Attachments: jira_io_increased.png
>
>
> 8Kb read-ahead logic in couch_file seems to cause extra input IO thrashing, 
> binary memory usage but doesn't speed-up



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[jira] [Commented] (COUCHDB-3284) 8Kb read-ahead in couch_file causes extra IO and binary memory usage

2017-01-27 Thread Nick Vatamaniuc (JIRA) 

[ 
https://issues.apache.org/jira/browse/COUCHDB-3284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15843539#comment-15843539
 ] 

Nick Vatamaniuc commented on COUCHDB-3284:
--

Attached performance graphs showing increased IO usage and increased binary 
memory usage. Those go away after disabling 8kb read-ahead logic

> 8Kb read-ahead in couch_file causes extra IO and binary memory usage
> 
>
> Key: COUCHDB-3284
> URL: https://issues.apache.org/jira/browse/COUCHDB-3284
> Project: CouchDB
>  Issue Type: Bug
>  Components: Database Core
>Affects Versions: 2.0.0
>Reporter: Nick Vatamaniuc
> Attachments: jira_io_increased.png
>
>
> 8Kb read-ahead logic in couch_file seems to cause extra input IO thrashing, 
> binary memory usage but doesn't speed-up



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