Databases
StackOverflow2013
Postsdbo
POQuerying database in a loop, loop with a sleep, or separate request
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POQuerying database in a loop, loop with a sleep, or separate request
    primarykey
    data
    text
    <p>I'm considering the 3 options and ill take more suggestions if any come up.</p> <p><strong>The problem</strong>: I keep getting advised to ditch the sleep and I don't have the background to pick between the three</p> <p>I keep getting told that sleep is very bad to use in a php script but no one ever highlights why. I intend for the system to be scalable ie the solution to this problem could be used 10 to 100 fold.</p> <p>Option 1: sleep</p> <pre><code>$timer = time() + (30); while($done==0){ $result = mysqli_query($mysqli, $query); $row_cnt = mysqli_num_rows($result); if ($row_cnt&gt;0){ $row = mysqli_fetch_array($result); print $row[0]; $done=1;} else{ $current = time(); if( $timer&gt;$current){sleep(1);} else{$done=1;} } </code></pre> <p>Option 2:</p> <p>Simply remove the sleep from above my non sever knowledge thinks this is worse but, I'm sure I could be very wrong</p> <pre><code>else{ $current = time(); if( $timer&gt;$current){} else{$done=1;} } </code></pre> <p>Option 3: is to have the client ask for the page in a loop and have the file simply present the info</p> <pre><code>$result = mysqli_query($mysqli,$query); $row_cnt = mysqli_num_rows($result); if ($row_cnt&gt;0){ $row = mysqli_fetch_array($result); print $row[0]; </code></pre> <p>So which is best given My goals:</p> <ul> <li>reliability-Most importance</li> <li>speed which client gets info</li> <li>scalability - lowest importance(still important)</li> </ul> <p>Please give me a why I really want to understand a claim that one method is superior </p> <p>If this gets marked as debatable it must mean all answers are valid :) and I'll take that as an answer :) </p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USmarc_s
    1. USJosh Cox
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COWhat problem are you trying to solve?
      singulars
      1. POQuerying database in a loop, loop with a sleep, or separate request
      1. USBarmar
    2. COthe problem is i keep getting advised to ditch the sleep and I dont have the background to pick between the three
      singulars
      1. POQuerying database in a loop, loop with a sleep, or separate request
      1. USJosh Cox
    3. COWhy do you have the sleep in the first place? It was presumably put there to solve some problem, since it's not normal in database query scripts.
      singulars
      1. POQuerying database in a loop, loop with a sleep, or separate request
      1. USBarmar
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload