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Asked: 2026-06-13T08:37:18+00:00

I have a table in DB and it is approx 90 GB in space.

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I have a table in DB and it is approx 90 GB in space. I tried to count no of rows in the table
select count(idNewsNotification) from notification and it resulted

4982397

1 row in set (59 min 48.35 sec)

But when I queried using show table status like <table_name> it is showing that 

 Engine: InnoDB
 Version: 10
 Row_format: Compact
 Rows: 8631267
 Avg_row_length: 11237
 Data_length: 96996425728
 Max_data_length: 0
 Index_length: 175374336
 Data_free: 0
 Auto_increment: NULL
 .....

What is the perfect procedure for knowing the no of records in the table ?

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1 Answer

  1. Editorial Team

    The fact that your count took an hour implies that you’re running InnoDB (which doesn’t cache this data).

    As such, the table status is an approximation based on other factors, and is not to be trusted.

    The count(*) would be accurate, but a pain to wait for.

    From the doc:

    Some storage engines, such as MyISAM, store the exact count. For other
    storage engines, such as InnoDB, this value is an approximation, and
    may vary from the actual value by as much as 40 to 50%. In such cases,
    use SELECT COUNT(*) to obtain an accurate count.

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