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Bug 220821 - Default PHP memory_limit should be increased on 64-bit platforms
Default PHP memory_limit should be increased on 64-bit platforms
Product: Fedora
Classification: Fedora
Component: php (Show other bugs)
x86_64 Linux
medium Severity medium
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Assigned To: Joe Orton
David Lawrence
Depends On:
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Reported: 2006-12-27 10:21 EST by Elliot Lee
Modified: 2007-11-30 17:11 EST (History)
0 users

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Fixed In Version: 5.2.0-10
Doc Type: Bug Fix
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Clone Of:
Last Closed: 2007-03-12 09:16:22 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Elliot Lee 2006-12-27 10:21:58 EST
Because 64-bit pointers & longs take up more memory, larger PHP scripts will not
run successfully on 64-bit platforms with default PHP configuration, even though
the same configuration allows them to run on 32-bit platforms. This is because
the memory_limit setting in /etc/php.ini is the same on both 32-bit and 64-bit

The memory limit on 64-bit platforms should be 1.5x to 2x the limit on 32-bit
Comment 1 Joe Orton 2007-01-03 07:51:31 EST
We've had fewer reports of memory_limit issues since the default was bumped to
16M everywhere (FC6) - were you still seeing this type of problem with the 16M
Comment 2 Elliot Lee 2007-01-07 11:02:45 EST
Yes; I had to bump the limit up to 32M to get things to work on x86_64. On i386,
16M seems to work OK, and I'm sure that limit is more than enough for most people.

The main point I was making was that if the limit is N megabytes on a 32-bit
platform, it should be N*2 megabytes on a 64-bit platform.
Comment 3 Joe Orton 2007-03-12 09:16:22 EDT
Using the N*2 value as one-size-works-everywhere is simpler; 32M seems a
reasonable stab in the dark; upstream bumped to 128M which seems too high.  This
was done in Raw Hide, thanks for the report.

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