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Posted to solr-dev@lucene.apache.org by "johnson.hong (JIRA)" <ji...@apache.org> on 2009/10/22 05:27:59 UTC

[jira] Created: (SOLR-1519) why it takes more and more time with small rows but increased start across distributed Solr

why it takes more and more time with small rows but  increased  start across distributed Solr
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                 Key: SOLR-1519
                 URL: https://issues.apache.org/jira/browse/SOLR-1519
             Project: Solr
          Issue Type: Bug
          Components: clients - java
    Affects Versions: 1.3
            Reporter: johnson.hong




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[jira] Resolved: (SOLR-1519) why it takes more and more time with small rows but increased start across distributed Solr

Posted by "Shalin Shekhar Mangar (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/SOLR-1519?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shalin Shekhar Mangar resolved SOLR-1519.
-----------------------------------------

    Resolution: Invalid

Please ask such questions on the solr-user mailing list before creating an issue.

The answer to your question is that distributed search fetches start+rows documents (just unique keys + scores) from each shard in order to correctly merge the results. This is why it gets slower as you keep on increasing the start value.

> why it takes more and more time with small rows but  increased  start across distributed Solr
> ---------------------------------------------------------------------------------------------
>
>                 Key: SOLR-1519
>                 URL: https://issues.apache.org/jira/browse/SOLR-1519
>             Project: Solr
>          Issue Type: Bug
>          Components: clients - java
>    Affects Versions: 1.3
>            Reporter: johnson.hong
>
> Hi,
>     I get a problem on Distributed Search:
>     There are 5 shards in my system, and I set rows to 20 and set start to 20 * pageIndex across each query.
>     It means I would get only 20 results easy query,and it did.
>     buy my question is :why it takes more and more time when  start is incrementally increased ?

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[jira] Updated: (SOLR-1519) why it takes more and more time with small rows but increased start across distributed Solr

Posted by "johnson.hong (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/SOLR-1519?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

johnson.hong updated SOLR-1519:
-------------------------------

    Description: 
Hi,
    I get a problem on Distributed Search:
    There are 5 shards in my system, and I set rows to 20 and set start to 20 * pageIndex across each query.
    It means I would get only 20 results easy query,and it did.
    buy my question is :why it takes more and more time when  start is incrementally increased ?

> why it takes more and more time with small rows but  increased  start across distributed Solr
> ---------------------------------------------------------------------------------------------
>
>                 Key: SOLR-1519
>                 URL: https://issues.apache.org/jira/browse/SOLR-1519
>             Project: Solr
>          Issue Type: Bug
>          Components: clients - java
>    Affects Versions: 1.3
>            Reporter: johnson.hong
>
> Hi,
>     I get a problem on Distributed Search:
>     There are 5 shards in my system, and I set rows to 20 and set start to 20 * pageIndex across each query.
>     It means I would get only 20 results easy query,and it did.
>     buy my question is :why it takes more and more time when  start is incrementally increased ?

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[jira] Commented: (SOLR-1519) why it takes more and more time with small rows but increased start across distributed Solr

Posted by "johnson.hong (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/SOLR-1519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12768563#action_12768563 ] 

johnson.hong commented on SOLR-1519:
------------------------------------

thank you for your answer,
but I don't understand that. Why distributed search fetches start+rows documents from eash shard?
do you mean that distributed search can't work fine with solr1.3 ,or how can i do for greater efficiency?



> why it takes more and more time with small rows but  increased  start across distributed Solr
> ---------------------------------------------------------------------------------------------
>
>                 Key: SOLR-1519
>                 URL: https://issues.apache.org/jira/browse/SOLR-1519
>             Project: Solr
>          Issue Type: Bug
>          Components: clients - java
>    Affects Versions: 1.3
>            Reporter: johnson.hong
>
> Hi,
>     I get a problem on Distributed Search:
>     There are 5 shards in my system, and I set rows to 20 and set start to 20 * pageIndex across each query.
>     It means I would get only 20 results easy query,and it did.
>     buy my question is :why it takes more and more time when  start is incrementally increased ?

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