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Re: Download Attachment Out of Memory Error
by Daniel Watts
::
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Jonathan Angliss wrote:
> On Wed, 03 Jun 2009 11:34:22 +0100, Daniel Watts <d@...>
> wrote:
>
>> Trying to download a 22MB rar file from sqirrelmail results in:
>>
>> Fatal error: Allowed memory size of 100663296 bytes exhausted (tried
>> to allocate 71 bytes) in
>> /var/www/localhost/webmail/functions/imap_general.php on line 491
>>
>>
>> We tried at 25MB xls file also - had to increase memory allowance to
>> around 200MB to get it to download.
>>
>> Any ideas why so much memory for a relatively small file?
>
> Oi, why do people insist on emailing such big files :)
I know i know! But they do. We often recommend yousendit.com =)
>
> bas64 encoding adds about a 3rd on top of the actual files size in
> encoding. So your 25MB file is now about 32MB in raw encoded data.
>
> Now, the cause of the problem is because of how we are fetching the
> data from the IMAP server. We're telling the IMAP server to give us
> the object data back to us in a single call, not much we can do about
> that, which means the IMAP server is dumping back to us the ~32MB of
> encoded data, which we process in chunks and decode. The problem is,
> we're dumping it into a variable to post back to the browser after
> it's done, which is where the memory issue comes up.
>
> I'm skimming over the code to see if we can stream the decoded data
> straight back to the browser instead of dumping it to a variable
> first.
I can see how this would double the memory required to 64MB+ but this
still seems far short of the ~200MB we're seeing necessary. Or does the
decoding algorithm need this extra memory for processing?
Thanks John,
Dan
------------------------------------------------------------------------------
OpenSolaris 2009.06 is a cutting edge operating system for enterprises
looking to deploy the next generation of Solaris that includes the latest
innovations from Sun and the OpenSource community. Download a copy and
enjoy capabilities such as Networking, Storage and Virtualization.
Go to: http://p.sf.net/sfu/opensolaris-get
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> On Wed, 03 Jun 2009 11:34:22 +0100, Daniel Watts <d@...>
> wrote:
>
>> Trying to download a 22MB rar file from sqirrelmail results in:
>>
>> Fatal error: Allowed memory size of 100663296 bytes exhausted (tried
>> to allocate 71 bytes) in
>> /var/www/localhost/webmail/functions/imap_general.php on line 491
>>
>>
>> We tried at 25MB xls file also - had to increase memory allowance to
>> around 200MB to get it to download.
>>
>> Any ideas why so much memory for a relatively small file?
>
> Oi, why do people insist on emailing such big files :)
I know i know! But they do. We often recommend yousendit.com =)
>
> bas64 encoding adds about a 3rd on top of the actual files size in
> encoding. So your 25MB file is now about 32MB in raw encoded data.
>
> Now, the cause of the problem is because of how we are fetching the
> data from the IMAP server. We're telling the IMAP server to give us
> the object data back to us in a single call, not much we can do about
> that, which means the IMAP server is dumping back to us the ~32MB of
> encoded data, which we process in chunks and decode. The problem is,
> we're dumping it into a variable to post back to the browser after
> it's done, which is where the memory issue comes up.
>
> I'm skimming over the code to see if we can stream the decoded data
> straight back to the browser instead of dumping it to a variable
> first.
I can see how this would double the memory required to 64MB+ but this
still seems far short of the ~200MB we're seeing necessary. Or does the
decoding algorithm need this extra memory for processing?
Thanks John,
Dan
------------------------------------------------------------------------------
OpenSolaris 2009.06 is a cutting edge operating system for enterprises
looking to deploy the next generation of Solaris that includes the latest
innovations from Sun and the OpenSource community. Download a copy and
enjoy capabilities such as Networking, Storage and Virtualization.
Go to: http://p.sf.net/sfu/opensolaris-get
-----
squirrelmail-devel mailing list
Posting guidelines: http://squirrelmail.org/postingguidelines
List address: squirrelmail-devel@...
List archives: http://news.gmane.org/gmane.mail.squirrelmail.devel
List info (subscribe/unsubscribe/change options): https://lists.sourceforge.net/lists/listinfo/squirrelmail-devel
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