Log production option enabling

2004-03-15 Thread Enrico . Venturi
Hello colleagues:
I would like to know if it's possible to start the log file production 
at run time, i.e. without
stopping and restarting the database ...
I would like to know also of it's possible to change at run time the 
directory where the log files
are stored after their generation.

I'm working with 3.23 release.

Thanks a lot
Enrico
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Re: Log production option enabling

2004-03-15 Thread Victoria Reznichenko
[EMAIL PROTECTED] wrote:
 Hello colleagues:
 I would like to know if it's possible to start the log file production 
 at run time, i.e. without
 stopping and restarting the database ...

No, you should restart MySQL server.

 I would like to know also of it's possible to change at run time the 
 directory where the log files
 are stored after their generation.

By default log files are stored in the MySQL data directory.

 
 I'm working with 3.23 release.
 


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Re: Log production option enabling

2004-03-15 Thread Tim Cutts
On 15 Mar 2004, at 12:34, Victoria Reznichenko wrote:

[EMAIL PROTECTED] wrote:
Hello colleagues:
I would like to know if it's possible to start the log file production
at run time, i.e. without
stopping and restarting the database ...
No, you should restart MySQL server.
Which is really irritating if you're debugging a problem with a busy 
production server.  You don't want the general query log on all the 
time, but you don't want to have to have database downtime (even if 
it's only momentary) to switch the logging on and then off again.

Tim

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Re: Log production option enabling

2004-03-15 Thread Victoria Reznichenko
Tim Cutts [EMAIL PROTECTED] wrote:
 
 On 15 Mar 2004, at 12:34, Victoria Reznichenko wrote:
 
 [EMAIL PROTECTED] wrote:
 Hello colleagues:
 I would like to know if it's possible to start the log file production
 at run time, i.e. without
 stopping and restarting the database ...

 No, you should restart MySQL server.
 
 Which is really irritating if you're debugging a problem with a busy 
 production server.  You don't want the general query log on all the 
 time, but you don't want to have to have database downtime (even if 
 it's only momentary) to switch the logging on and then off again.

You can enable/disable logging for session with SET SQL_LOG_OFF statement if user has 
SUPER privilege.
It's supported from version 4.0:
http://www.mysql.com/doc/en/SET_OPTION.html


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