| Subject | RE: frequent update a table, please give me some advise! |
|---|---|
| Author | |
| Post date | 2013-09-09T12:48:38Z |
>Hi Jimmy!
>Please tell us more if you want an accurate answer to your problem. The two options that I think of, is:
Sorry, the table Ext_Meter has 100,000 rows, all of rows have been updated once everyday.
However, it appears that the query (select * from ext_meter) has been freezed once every 2 or 3 months.
I set sweep interval to 0 and I did not run sweep.
>oldest (active) and next transaction is big (if this is the case, you would normally observe that many
>selects ran slow).
when select ext_meter was freezed, it seemed that other selects ran normally.
>b) If you're using a transaction with lock resolution WAIT and another transaction has uncommitted
>changes to a record you are trying to modify. Try changing to NO WAIT or set a shorter LOCK
>TIMEOUT to see if you get an error message rather than things appearing to hang (normally, this
>should only happen if you UPDATE something, not if you only do SELECT).
>
I will check if I have used WAIT or not.
>Probably, there could be other reasons as well.
Thanks!
jimmy