Accuracy of counties line in the MySQL Table

I was just looking at the counts of row of the table for some of my MySQL tables listed in HQ... some of these tables should only increase in number of lines (never delete us rows), but table varies greatly as to how many lines is in the table.

So I have two questions...
(1) these figures are absolutely not accurate... his watch a table which always increases in length as having 100 lines, then 75 and 90 and 88, etc..  IT should show 100, 101, 104, 110.

(2) I know that the MySQL "SELECT COUNT (*) FROM tablename" statement is VERY slow on my servers.  HQ runs this command on my database?  If so, I need to disable this "feature" because he's going to kill my database.  The COUNT command on a table over 1 million lines takes an incredible amount of resources on my MySQL server... and we try to avoid to execute commands to COUNT on these large tables...
(a) if it executes a SELECT COUNT?
(b) can I turn that off?

Thank you!
Stephen

Hello

It seems to me that hyperic is not a command select count(), but one
display the State of the table. It is incorrect when you use innodb tables...

"Some drivers of storage, such as MyISAM tables, store the exact number. For others
engine storage, such as InnoDB, this value is an approximation and may
changing the actual value by as much as 40-50%. In this case, use
SELECT COUNT (*) to get an accurate count. »

The advantage of this is that it is not processor intensive.

Rgds

Simon.
>
> I was just looking at the counts of row of the table for some of my MySQL tables
> listed in HQ... some of these tables should only be more and more
> lines (never delete us lines), but the picture varies greatly as to how much
> rows are in the table.
>
> So I have two questions...
> 1) these numbers are absolutely not accurate... its a table showing that
> increasing in length as having 100 lines, then 75, then 90, then 88,.
> etc.  IT should show 100, 101, 104, 110.
>
(> 2) I know that the MySQL "SELECT COUNT (*) FROM tablename" statement is
> VERY slow on my servers.  HQ runs this command on my database?  If
> then I have to disable this "feature" because he's going to kill my database.  The
> Order of COUNTY on a table over 1 million lines takes an incredible amount
> resources on my MySQL server... and we try to avoid running COUNT
> orders on these large tables...
(> a) if he executes a SELECT COUNT?
(> b) can I turn that off?
>
> Thank you!
> Stephen
>
> --
> This message has been scanned for viruses and
> dangerous by MailScanner and is content
> supposed to be clean.

Tags: VMware

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