Database Maintenance Of Your Blog

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Lately I have been spending a little bit of time performing maintenance tasks on my blog’s SQL Server. I noticed that OdeToCode’s Scott Allen was in the same mood.

In looking to free up some database space, he took the somewhat drastic step of deleting all referrals and urls before a certain date. Since he doesn’t care about this data, it isn’t really all that drastic. But it makes a data packrat like me shudder. I wanted to free up some space as well so I created an approach that frees up a lot of space, but keeps the data I care about.

Around 90% to 99% of my referrals are from web searches and online blog readers. As a matter of fact, nearly all of these are from Google. Since those referrals are not that important to me as WebHost4Life also tracks that data, I wrote a script to delete them for Subtext. Note that the following SQL script is pretty aggressive, so use at your own risk. You might even think of some search strings that I missed.

DELETE FROM subtext_Referrals

WHERE UrlID IN

(

  SELECT UrlID

  FROM subtext_URLs

  WHERE Url LIKE 'http://google.%'

    OR Url LIKE 'http://%.yahoo.%'

    OR Url LIKE 'http://yahoo.%'

    OR Url LIKE '%/Search/%'

    OR Url LIKE '%/Search?%'

    OR Url LIKE 'http://search.%'

    OR Url LIKE 'http://bloglines.%'

)

 

DELETE FROM subtext_URLs

WHERE Url LIKE 'http://google.%'

  OR Url LIKE 'http://%.yahoo.%'

  OR Url LIKE 'http://yahoo.%'

  OR Url LIKE '%/Search/%'

  OR Url LIKE '%/Search?%'

  OR Url LIKE 'http://search.%'

  OR Url LIKE 'http://bloglines.%'

I then ran the same commands that Scott did after reading his post.

DBCC DBREINDEX(subtext_URLs)

DBCC DBREINDEX(subtext_Referrals)

DBCC SHRINKDATABASE(SubtextData)

In order to run those commands on .TEXT, just replace the “subtext_” prefix with “blog_” and you are set.

Now I haven’t tested this, but I imagine the corresponding script for Community Server would be the following based on its published schema.

DELETE FROM cs_Referrals

WHERE UrlID IN

(

    SELECT UrlID FROM cs_Urls

    WHERE Url LIKE 'http://google.%'

      OR Url LIKE 'http://%.yahoo.%'

      OR Url LIKE 'http://yahoo.%'

      OR UrlLIKE '%/Search/%'

      OR Url LIKE '%/Search?%'

      OR Url LIKE 'http://search.%'

      OR Url LIKE 'http://bloglines.%'

)

 

DELETE FROM cs_Urls

WHERE Url LIKE 'http://google.%'

  OR Url LIKE 'http://%.yahoo.%'

  OR Url LIKE 'http://yahoo.%'

  OR UrlLIKE '%/Search/%'

  OR UrlLIKE '%/Search?%'

  OR UrlLIKE 'http://search.%'

  OR UrlLIKE 'http://bloglines.%'

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