Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Profile.

Timings I would think would be interesting would be the time taken in the $sth_chr->execute statement, the translate call (is it something that could be done more efficiently in the select call?), the time spent in the if(!defined($x)){$x = 0} statements vs having the DB pre-populate that for you, the time spent in the sorting of the keys, and anything else that shows up in a profiling run.

This (as stated in other posts on this thread) is speculation, but I wonder if the sort could be sped up (if it is a bottleneck) by breaking the keys unsorted out, partitioning the data, sorting each individually, and merging the results. The other possibility, if it is the output that is the bottleneck and not the sort, is that the additional I/O would increase the time. Without profiling data it is impossible to know where to focus.

--MidLifeXis


In reply to Re^3: Processing ~1 Trillion records by MidLifeXis
in thread Processing ~1 Trillion records by aossama

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (7)
As of 2022-08-10 08:49 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?