I recently updated to wordpress 4.3 and I noticed an increased memory usage on my server. Sometimes the memory usage is as double as the previous one.

Does anyone has the same experience.

1 Answer 1


Yes, we experienced the same problem. It's related to cron events. Reversed arguments for scheduled task to split terms can cause the database to explode.

There is a major bug that has been resolved, see this ticket.

@Otto posted a solution to this bug in the WordPress support forums here. This solution worked for us.

Simply put, open wp-includes/taxonomy.php and replace:

wp_schedule_single_event( 'wp_batch_split_terms', time() + MINUTE_IN_SECONDS );


wp_schedule_single_event( time() + MINUTE_IN_SECONDS, 'wp_batch_split_terms' );

On top of this, you need to create a must use plugin with the following code:

function clear_bad_cron_entries() {
    // Fix incorrect cron entries for term splitting
    $cron_array = _get_cron_array();
    if ( isset( $cron_array['wp_batch_split_terms'] ) ) {
        unset( $cron_array['wp_batch_split_terms'] );
            _set_cron_array( $cron_array );

Run that only once.

I would highly recommend that you read through Otto's detailed guide on this if you don't know what you are doing.

There is also a hotfix plugin available here.

The answer to why WordPress hasn't carried out a 4.3.1. push with more than two weeks of discovering this bug is completely beyond me.

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