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Re: dbh->disconnect or leave to scope

by andreas1234567 (Vicar)
on Jan 19, 2011 at 05:45 UTC ( #883062=note: print w/replies, xml ) Need Help??

in reply to dbh->disconnect or leave to scope

It depends largely on your choice of database and your use of it.
  • Are your database server's connect operations lightweight (MySQL) or heavyweight (DB2) ?
  • Do you connect and disconnect often?
  • Do you maintain a small or large number of simultaneous connections?
  • Do you fork ?
No matter how great and destructive your problems may seem now, remember, you've probably only seen the tip of them. [1]

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Re^2: dbh->disconnect or leave to scope
by Cagao (Monk) on Jan 19, 2011 at 10:16 UTC

    We connect to 3 DB platforms (all on MySQL tho).

    One is a single master, the other 2 are masters with several slaves.

    I don't pass dbh's around between methods, since sometimes I may have connected to a slave for read-only operations, but might have passed the the dbh into a method requiring write access to the master, so it's easier to connect in each method (to the relevant master/slave), plus, it's MySQL, so not a massive hit on the connection time.

    We clearly connect/disconnect a fair amount, but this isn't causing performance implications (yet).

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