Hi
There is no such thing as a free lunch, certainly not for a 1M lines
of code base :)
On 9/12/12 12:27 AM, guangliang peng wrote:
> hi,
> i am a new learner of monetdb.And i have some questions below.
>
> 1 when I ran some queries on monetdb,I found that the memory was
> automatically released by monetdb.And it needs extra time to load data into
> memory again.I don't know why and if there are some triggers in monetdb?
> Thank you for helps.
>
Understand how memory mapped files
work on an operating system tells most of the story.
> 2 how do i see the join path when i run a query?
Use the Plan/explain/Trace/debug or stethoscope features of the system
to look for the {left,semi}join[Path] calls and the 'dot' file generated from
the plans.
>
> 3 what's source code structure? i want to read the source code .And any
> advices for better understanding source code.
>
Read the MonetDB papers and PhD thesises.
regards, Martin
> thank,
>
> guangliang peng
>
>
>
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