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jbudd
PostPosted: 22. Sep 2009, 13:53 
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Joined: 5. Jul 2009, 11:25
Posts: 8
I am using JFU on a server with PHP memory limit set to 16MB. JFU falls over trying to resize any pic 2000 + pixels.

Why not increase the memory limit for this script?

A possible tweek of tfu_helper.php to do this:
Code:
function isMemoryOk($oldsize, $image_name, $debug = true)
{
    // if (isset($oldsize) && ($oldsize[0] == 0)) { // we cannot read the size - therefore we assume it's enough memory available.
    // return true;
    // }
    $memory = ($oldsize[0] * $oldsize[1] * 6) + 1048576; // mem and we add 1 MB for safty

/* jb increase memory as needed */
$InUse=memory_get_usage();
//debug('Before Memory in use ' . $InUse . ' Needed ' . $memory . ' Limit ' . ini_get('memory_limit'));
if ($memory > return_kbytes(ini_get('memory_limit')) - $InUse)
{
   //Try to set it
   ini_set('memory_limit',$memory + $InUse);
}
//debug('After  Memory in use ' . $InUse . ' Needed ' . $memory . ' Limit ' . ini_get('memory_limit'));

    $memory_limit = return_kbytes(ini_get('memory_limit')) * 1024;
    if ($memory > $memory_limit && $memory_limit > 0) { // we store the number of images that have a size problem in the session and output this in the readDir file
        $mem_errors = 0;
        if (isset($_SESSION['upload_memory_limit'])) {
            $mem_errors = $_SESSION['upload_memory_limit'];
        }
        $_SESSION['upload_memory_limit'] = ($mem_errors + 1);
        if ($debug) {
            debug('File ' . $image_name . ' cannot be processed because not enough memory is available! Needed: ~' . $memory . '. Available: ' . $memory_limit);
        }
        return false;
    } else {
        return true;
    }
}


Last edited by jbudd on 22. Sep 2009, 13:59, edited 2 times in total.

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jbudd
 Post subject:
PostPosted: 22. Sep 2009, 13:57 
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Joined: 5. Jul 2009, 11:25
Posts: 8
Of course the Info/Limits/Register would have to be changed too, maybe "The script will attempt to get around limitations due to the PHP memory limit"
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TinyWebGallery
 Post subject:
PostPosted: 22. Sep 2009, 14:01 
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Joined: 1. Aug 2005, 12:53
Posts: 11232
Most of the server do not allow to increase the memory limit with php.
Does yours?

- Michael
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jbudd
 Post subject:
PostPosted: 22. Sep 2009, 17:11 
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Joined: 5. Jul 2009, 11:25
Posts: 8
I believe that PHP has to be compiled with a particular option to allow this. ini_set ("memory_limit"... ); appears in the component Extplorer and the plugin Content Optimizer, which work on my site, so it should work in JFU
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TinyWebGallery
 Post subject:
PostPosted: 22. Sep 2009, 17:15 
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Posts: 11232
In TWG I have a special parameter where you can enable the increase. I check if I can do this automatically - because setting the value and that it is used are 2 different things. And if I cannot detect this then I cannot provide a good error message for the user ...

-Michael
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jbudd
 Post subject:
PostPosted: 22. Sep 2009, 17:41 
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Joined: 5. Jul 2009, 11:25
Posts: 8
I'm not clear what you mean Michael.

With the above code, if PHP is set up to deny ini_set() requests, the user should get the same "n images could not be resized because of insufficient memory" that they get now?

jb
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TinyWebGallery
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PostPosted: 22. Sep 2009, 18:12 
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this was my point - how does it deny it?
or can i set it - I do get the new value back and it just ignores it?

- Michael
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jbudd
 Post subject:
PostPosted: 23. Sep 2009, 11:03 
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Joined: 5. Jul 2009, 11:25
Posts: 8
I tried it on my PC with wampserver (slightly different code - below)

The only way I could get ini_set() to fail was by using safe_mode = On in php.ini.

The user gets the message 2 file(s) of 2 could not be uploaded. For 2 file(s) the server had not enough memory to resize!
There is nothing in the PHP error log.
tfu.log contains
Code:
09.23.2009 10:53:16 - Trying to resize DSCF1785.JPG 3488x2616 Before: Memory needed 55796224 + 1223152 (in use) = 57019376 Limit:16M
09.23.2009 10:53:16 - After: Limit 16M
09.23.2009 10:53:16 - File DSCF1785.JPG cannot be processed because not enough memory is available! Needed: ~55796224. Available: 16777216
09.23.2009 10:53:17 - Trying to resize ox 109.JPG 2816x2112 Before: Memory needed 36732928 + 1223144 (in use) = 37956072 Limit:16M
09.23.2009 10:53:17 - After: Limit 16M
09.23.2009 10:53:17 - File ox 109.JPG cannot be processed because not enough memory is available! Needed: ~36732928. Available: 16777216


With safe_mode = Off the pictures are resized successfully.
tfu.log has
Code:
09.23.2009 10:49:32 - Trying to resize DSCF1074.JPG 3488x2616 Before: Memory needed 55796224 + 1223152 (in use) = 57019376 Limit:16M
09.23.2009 10:49:32 - After: Limit 57019376
09.23.2009 10:49:42 - Trying to resize ox 109.JPG 2816x2112 Before: Memory needed 36732928 + 1223272 (in use) = 37956200 Limit:16M
09.23.2009 10:49:42 - After: Limit 37956200


I notice that the memory limit reverts to 16M after the first file is processed.

Conclusion: If ini_set() fails, the program seems to operate as standard. If ini_set() works, it can resize bigger pictures. It seems to be a useful mod.

This is the corrected code I used
Code:
/* jb increase memory as needed */
$InUse=memory_get_usage();
// Check if we need to set it
if ($memory > return_kbytes(ini_get('memory_limit'))*1024 - $InUse)
{
debug('Trying to resize ' . $image_name . ' ' . $oldsize[0] . 'x' . $oldsize[1] . ' Before: Memory needed ' . $memory . ' + ' . $InUse . ' (in use) = ' . ($memory + $InUse) . ' Limit:' . ini_get('memory_limit'));
   //Try to set it
   ini_set('memory_limit',$memory + $InUse);
debug('After: Limit ' . ini_get('memory_limit'));
}


Last edited by jbudd on 23. Sep 2009, 11:06, edited 1 time in total.

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TinyWebGallery
 Post subject:
PostPosted: 23. Sep 2009, 11:06 
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Joined: 1. Aug 2005, 12:53
Posts: 11232
Thanks,

This looks really good.
I will include this change in the next build and will add this to TWG for the next version then as well.

- Michael
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