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Editorial Team
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Asked: 2026-05-15T23:10:35+00:00

I have a cron that runs through many rows, deleting the bad ones (according

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I have a cron that runs through many rows, deleting the “bad” ones (according to my criteria). I’m just wondering what would be the best to optimize the script. I can do one of the following:

  1. Have the same cron instantly delete the “bad” rows upon finding them.

  2. Have the same cron instantly update the “bad” rows to status “1”, meaning bad. Then, I can set up another cron that runs onces an hour deleting all rows with status “1”. To make it faster, I guess I’d have an index on “status”, but that might also ruin performance.

Any suggestions?

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1 Answer

  1. Editorial Team

    I am not experienced in mySQL but on other DBMS I worked on an update and then delete does not help. Just try with huge amounts of data and measure the time on the delete versus update+delete. It helps if the columns that act as a criteria for the “bad” ones have an index.

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