From: Fabian Groffen <fabian@monetdb.org>
To: users-list@monetdb.org
Sent: Sunday, February 10, 2013 11:33 PM
Subject: Re: monetdb status health
On 10-02-2013 09:44:09 -0800, Tapomay Dey wrote:
> My questions are simple:
>
> what causes crashes?
The mserver5 (monetdb database) terminates in such a way that it can
not be considered a clean shutdown, this is usually the case when the
program gets terminated due to a condition that makes further execution
impossible, e.g. memory faults. These are almost always program errors.
> what is health?
Health is the percentage of start-stop sequences compared to the number
of times the database was actually started. E.g. how many times a start
was followed by a clean shutdown (hence no crash).
> how do we stop health from degrading?
You can't, a database that crashes, and keeps on doing so will cause the
health of the database to degrade.
> Following is the status of my db-
> start count: 140
> stop count: 1
> crash
count: 138
So, essentially, every time you start your database, it never reaches a
point where you stop it cleanly, but instead your database crashes all
the time.
--
Fabian Groffen
fabian@monetdb.orgcolumn-store pioneer http://www.monetdb.org/Home
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