From: brian dot foddy at nwa dot com
Operating system: Solaris 2.8
PHP version: 5.0.2
PHP Bug Type: Performance problem
Bug description: Unable to have concurrent execution of same page
Description:
------------
Frankly I can't believe this is a bug, but I can't
find any config to change this behavior...
Using 5.0.2 on Solaris 2.8 and Apache 1.3.22,
we are unable to have concurrent execuation of
the same script at the same time. Any attempt
to run the script below from 2 browsers,
the first one will start normally, displaying
"starting", then during the sleep, try a second
request and it will not begin any execution
until the first request completes, then it begins
its normal execution.
If this script is duplicated to a different
file name,
ie: concurrent1.php and concurrent2.php, then
both can execute at the same time as you would expect.
This server was upgraded from version 4.3x some
months back and I'm sure it didn't have this
behavior. In general our server is a low-volume
intranet server so this problems only shows up
on rare occasions when a specific web app is
needed.
Apache config:
MinSpareServers 2
MaxSpareServers 12
StartServers 8
MaxClients 20
The web server is not reaching these limits for
my tests.
Reproduce code:
---------------
<?php
print ("starting");
flush ();
touch ("foo.dat");
sleep (60);
?>
Done.
Execute from 2 browsers at the same time.
Expected result:
----------------
Both browsers should show "starting" then
wait the 60 seconds.
Actual result:
--------------
The first request starts normally, the second
page waits for the first to complete before the
second begins.
--
Edit bug report at http://bugs.php.net/?id=30589&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=30589&r=trysnapshot4
Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=30589&r=trysnapshot50
Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=30589&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=30589&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=30589&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=30589&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=30589&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=30589&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=30589&r=support
Expected behavior: http://bugs.php.net/fix.php?id=30589&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=30589&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=30589&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=30589&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=30589&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=30589&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=30589&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=30589&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=30589&r=float
MySQL Configuration Error: http://bugs.php.net/fix.php?id=30589&r=mysqlcfg
