Mnesia is overloaded ?

[Sean Hinde]

It also makes a big difference whether you have dump_log_load_regulation set
to true or false. If true, the dumper process runs much more slowly which
will make the error report more likely, If false the dumper runs at full
speed but the emulator itself can pause noticably while it waits for lots of
disc intensive bifs to complete.

I tend to run with it set to true as I need to guarantee read response
times.

Sean

> -----Original Message-----
> From: Ulf Wiger [mailto:etxuwig@REDACTED]
> Sent: 26 July 2000 11:51
> To: Mickael Remond
> Cc: erlang-questions@REDACTED
> Subject: Re: Mnesia is overloaded ?
> 
> 
> On 25 Jul 2000, Mickael Remond wrote:
> 
> >
> >When trying to store a lot of data in Mnesia, I get the 
> following message:
> >
> >  ** ERROR ** Mnesia is overloaded: {dump_log,write_threshold}
> >
> >What does it mean ?
> >
> >In fact, it seems that the data are correctly stored in the 
> database, so maybe
> >an error recovery process has been triggered, but ... I don't known 
> 
> The error message is generated when a log dump has been triggered
> before the previous one completed. Mnesia can handle this, but it's a
> warning that a backlog is beginning to pile up.
> 
> If those error messages keep popping up, you may be working your way
> into a fatal overload situation. However, if your application stops
> writing to mnesia, or at least slows down, mnesia will catch up.
> 
> /Uffe
> -- 
> Ulf Wiger                                    tfn: +46  8 719 81 95
> Network Architecture & Product Strategies    mob: +46 70 519 81 95
> Ericsson Telecom AB,              Datacom Networks and IP Services
> Varuvägen 9, Älvsjö,                    S-126 25 Stockholm, Sweden
> 



NOTICE AND DISCLAIMER:
This email (including attachments) is confidential.  If you have received
this email in error please notify the sender immediately and delete this
email from your system without copying or disseminating it or placing any
reliance upon its contents.  We cannot accept liability for any breaches of
confidence arising through use of email.  Any opinions expressed in this
email (including attachments) are those of the author and do not necessarily
reflect our opinions.  We will not accept responsibility for any commitments
made by our employees outside the scope of our business.  We do not warrant
the accuracy or completeness of such information.