From: [EMAIL PROTECTED]
Operating system: Digital Unix V4.0F
PHP version: 4CVS-2002-10-07
PHP Bug Type: Performance problem
Bug description: Oracle query in array, returned by function: memory leak + high CPU
load
I need to generate some reports and I need to have some table's data as a
whole as some columns of a row in this table and other tables reference
other rows of this table. The PHP version is 4.0.4pl1, Apache is 1.3.14,
and Oracle 8.1.7.
So basically, I do this inside a function:
.
.
.
while (ora_fetch($cursor)) {
$key = ora_getcolumn($cursor, 0);
for ($j=0; $j<ora_numcols($cursor); $j++) {
$col_name=ora_columnname($cursor, $j);
$col_value = ora_getcolumn($cursor,$j);
$ret_array[$key][$col_name] = $col_value;
}
}
.
.
.
Here are my problems:
- after the end of the script execution, the CPU load (seen by top) goes
up to 99.90% for several minutes (for 4000 entries of 20 columns, it lasts
about 2 minutes); during the script execution and HTTP transfer, the CPU
load is normal, once the file transfer is over, the load becomes 99.x %
- if I do this on a just started Apache, a lot of memory is consumed
(normal) but not released:
Before:
nobody 10159 0.0 0.1 14.8M 2.3M ?? S 14:42:45 0:00.25
/www/bin/httpd
After
nobody 10159 99.9 0.7 42.7M 29M ?? R 14:42:45 0:36.23
/www/bin/httpd
^^^^ CPU ^^^^ ^^^^^RAM
- I did some experiements and observed this:
- if I do an exit in the returning function just before "return
$ret_array", then the high CPU load does not occurs (I'm not sure about
memory leak)
- if now I do an exit just after calling the function, then the high
CPU load occurs (I'm not sure about memory leak). It looks like if
$ret_array "moves" out of the function, a high CPU load occurs... I have
tried with references, unset, etc... before/after calling the function to
help the garbage collection at the end of the script but it doesn't help,
I always have the high CPU load.
Do you have any idea of what's happening?
--
Edit bug report at http://bugs.php.net/?id=19796&edit=1
--
Try a CVS snapshot: http://bugs.php.net/fix.php?id=19796&r=trysnapshot
Fixed in CVS: http://bugs.php.net/fix.php?id=19796&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=19796&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=19796&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=19796&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=19796&r=support
Expected behavior: http://bugs.php.net/fix.php?id=19796&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=19796&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=19796&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=19796&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=19796&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=19796&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=19796&r=isapi
