mysql - Fast rand() order search -

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we have table of 50k items , display @ search page random sort , 10 items per page. need apply filters.

rand() or without seed slow. note items have 3 categories. first category should displayed first random order, , second category, random order.

  • generating random number between 0 , max_id s not working because of pages , mentioned constraints
  • randomizing records php makes items display @ same page

is there better solution speed random search?

here few tip hopes works

  • put indexes on main field on filtering
  • reduce number of column in select query (only use needed columns)
  • recheck joins
  • recheck conditions
  • recheck group/having/order clause

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