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8202712
2007 Jun 26
1
Memory Experimentation: Rule of Thumb = 10-15 Times the Memory
...tines that are always loaded. Good..
Next, I created a s.csv file with 22 variables and 500,000
observations, taking up an uncompressed disk space of 115MB. The
resulting object.size() after a read.csv() is 84,002,712 bytes (80MB).
> s= read.csv("s.csv");
> object.size(s);
[1] 84002712
here is where things get more interesting. after the read.csv() is
finished, gc() reports
used (Mb) gc trigger (Mb) max used (Mb)
Ncells 270505 14.5 8349948 446.0 11268682 601.9
Vcells 10639515 81.2 34345544 262.1 42834692 326.9
I was a big surprised by this---R had 928MB i...
2007 Aug 09
1
Memory Experimentation: Rule of Thumb = 10-15 Times the Memory
...gt;
> Next, I created a s.csv file with 22 variables and 500,000
> observations, taking up an uncompressed disk space of 115MB. The
> resulting object.size() after a read.csv() is 84,002,712 bytes (80MB).
>
>> s= read.csv("s.csv");
>> object.size(s);
>
> [1] 84002712
>
>
> here is where things get more interesting. after the read.csv() is
> finished, gc() reports
>
> used (Mb) gc trigger (Mb) max used (Mb)
> Ncells 270505 14.5 8349948 446.0 11268682 601.9
> Vcells 10639515 81.2 34345544 262.1 42834692 326.9
>
>...