First it's not such a good idea to show 30k records to a browser.. If you use this 
script in console it's ok.
I don't think that the problems comes from the data size.. check your <for>.. maybe 
has an infinite loop.

Anyway if the problem comes from the data size you can find out by reading only 1k 

good luck
  ----- Original Message ----- 
  From: antonio bernabei 
  Sent: Wednesday, April 07, 2004 11:22 AM
  Subject: [PHP-DB] Large Arrays in a batch procedure

  I have a problem. On a small lan I need to process a table with about 30000
  records. The work is to apply a formula to some fields of each record and
  update another field of the same table.
  I run php on a win2000 professional system and the first approach was to
  make a for cycle in which I apply the formula to all records and echo the
  result of the formula, just to show that the work is going on.
  But I get into a timeout of the system after 30 seconds
  Which is the right approach to this type of work, let's call it batch work?
  Thank you
  Antonio Bernabei

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