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[2010-03-22 04:17 UTC] mat999 at gmail dot com
Description:
------------
Reproduced on:
- Debian Lenny (dotdeb): PHP 5.3.2
- Fastcgi & CLI
- With and without xcache
- amd64 architecture
Test script:
---------------
<?php
for($i=0;$i<=100000;$i++){
$m = mysqli_init();
mysqli_real_connect($m,'localhost','root','passwordmysql');
$m = mysqli_close($m);
unset($m);
if(($i%1000)===0){
echo "Memory consumption after $i iterations is " . memory_get_usage() . "<br /><br />";
flush();
}
}
die();
?>
Expected result:
----------------
Loop with a little if any memory increase.
Actual result:
--------------
Memory consumption after 0 iterations is 660120
Memory consumption after 1000 iterations is 852600
Memory consumption after 2000 iterations is 1044832
Memory consumption after 3000 iterations is 1245216
Memory consumption after 4000 iterations is 1429224
Memory consumption after 5000 iterations is 1645992
Memory consumption after 6000 iterations is 1830000
Memory consumption after 7000 iterations is 2014000
Memory consumption after 8000 iterations is 2198016
Memory consumption after 9000 iterations is 2447552
Memory consumption after 10000 iterations is 2631608
Memory consumption after 11000 iterations is 2815608
Memory consumption after 12000 iterations is 2999616
Memory consumption after 13000 iterations is 3183624
Memory consumption after 14000 iterations is 3367624
Memory consumption after 15000 iterations is 3551640
Memory consumption after 16000 iterations is 3735648
Memory consumption after 17000 iterations is 4050720
Memory consumption after 18000 iterations is 4234728
Memory consumption after 19000 iterations is 4418728
Memory consumption after 20000 iterations is 4602736
Memory consumption after 21000 iterations is 4786744
Memory consumption after 22000 iterations is 4970744
Memory consumption after 23000 iterations is 5154760
Memory consumption after 24000 iterations is 5338768
Memory consumption after 25000 iterations is 5522776
Memory consumption after 26000 iterations is 5706776
Memory consumption after 27000 iterations is 5890792
Memory consumption after 28000 iterations is 6074800
Memory consumption after 29000 iterations is 6258800
Memory consumption after 30000 iterations is 6442808
Memory consumption after 31000 iterations is 6626824
Memory consumption after 32000 iterations is 6810832
Memory consumption after 33000 iterations is 7256976
Memory consumption after 34000 iterations is 7440984
Memory consumption after 35000 iterations is 7625000
Memory consumption after 36000 iterations is 7809000
Memory consumption after 37000 iterations is 7993008
Memory consumption after 38000 iterations is 8177016
Memory consumption after 39000 iterations is 8361016
Memory consumption after 40000 iterations is 8545032
Memory consumption after 41000 iterations is 8729040
Memory consumption after 42000 iterations is 8913048
Memory consumption after 43000 iterations is 9097048
Memory consumption after 44000 iterations is 9281064
Memory consumption after 45000 iterations is 9465072
Memory consumption after 46000 iterations is 9649072
Memory consumption after 47000 iterations is 9833080
Memory consumption after 48000 iterations is 10017096
Memory consumption after 49000 iterations is 10201096
Memory consumption after 50000 iterations is 10385104
Memory consumption after 51000 iterations is 10569112
Memory consumption after 52000 iterations is 10753128
Memory consumption after 53000 iterations is 10937128
Memory consumption after 54000 iterations is 11121136
Memory consumption after 55000 iterations is 11305144
Memory consumption after 56000 iterations is 11489144
Memory consumption after 57000 iterations is 11673160
Memory consumption after 58000 iterations is 11857168
Memory consumption after 59000 iterations is 12041168
Memory consumption after 60000 iterations is 12225176
Memory consumption after 61000 iterations is 12409192
Memory consumption after 62000 iterations is 12593200
Memory consumption after 63000 iterations is 12777200
Memory consumption after 64000 iterations is 12961208
Memory consumption after 65000 iterations is 13145224
Memory consumption after 66000 iterations is 13853512
Memory consumption after 67000 iterations is 14037520
Memory consumption after 68000 iterations is 14221528
Memory consumption after 69000 iterations is 14405528
Memory consumption after 70000 iterations is 14589544
Memory consumption after 71000 iterations is 14773552
Memory consumption after 72000 iterations is 14957560
Memory consumption after 73000 iterations is 15141560
Memory consumption after 74000 iterations is 15325576
Memory consumption after 75000 iterations is 15509584
Memory consumption after 76000 iterations is 15693584
Memory consumption after 77000 iterations is 15877592
Memory consumption after 78000 iterations is 16061608
Memory consumption after 79000 iterations is 16245616
Memory consumption after 80000 iterations is 16429616
Memory consumption after 81000 iterations is 16613624
Memory consumption after 82000 iterations is 16797640
Memory consumption after 83000 iterations is 16981640
Memory consumption after 84000 iterations is 17165648
Memory consumption after 85000 iterations is 17349656
Memory consumption after 86000 iterations is 17533656
Memory consumption after 87000 iterations is 17717672
Memory consumption after 88000 iterations is 17901680
Memory consumption after 89000 iterations is 18085688
Memory consumption after 90000 iterations is 18269688
Memory consumption after 91000 iterations is 18453704
Memory consumption after 92000 iterations is 18637712
Memory consumption after 93000 iterations is 18821712
Memory consumption after 94000 iterations is 19005720
Memory consumption after 95000 iterations is 19189736
Memory consumption after 96000 iterations is 19373736
Memory consumption after 97000 iterations is 19557744
Memory consumption after 98000 iterations is 19741752
Memory consumption after 99000 iterations is 19925768
Memory consumption after 100000 iterations is 20109768
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Last updated: Sat Nov 08 17:00:02 2025 UTC |
Yes that is the result obtained with that ENV var set, howeaver the processes usage still grows. 64031 root 20 0 173m 44m 6652 S 43 2.3 0:09.46 php5 In order to obtain that reading the following was used: before executing: USE_ZEND_ALLOC=0 export USE_ZEND_ALLOC=0 Script: <?php for($i=0;$i<=1000000;$i++){ $m = mysqli_init(); mysqli_real_connect($m,'localhost','root','passwordmysql'); $m = mysqli_close($m); unset($m); if(($i%1000)===0){ echo "Memory consumption after $i iterations is " . memory_get_usage() . "<br /><br />"; flush(); usleep(200); } } die(); ?> and top to obtain the usage