Description:
------------
php in fastcgi environment periodicaly get >90% of CPU and >1.5g of memory

fast-cgi environment:
SPAWNFCGI="/usr/local/bin/spawn-fcgi"
FCGIPROGRAM="/usr/local/bin/php"
FCGIPORT="8888"
PHP_FCGI_CHILDREN=200
PHP_FCGI_MAX_REQUESTS=2000
FCGI_WEB_SERVER_ADDRS="127.0.0.1"
ALLOWED_ENV="PATH USER"
ALLOWED_ENV="$ALLOWED_ENV PHP_FCGI_MAX_REQUESTS FCGI_WEB_SERVER_ADDRS"

periodicaly i have in top:
4968 www-data  19   0 1964m 1.4g 149m R 59.0 17.7   1:46.77 php
4856 www-data  17   0 2054m 1.6g 148m R 31.9 17.5   1:59.90 php
4846 www-data  18   0 1316m 1.1g 148m R 26.1 14.8   1:16.63 php
4866 www-data  15   0  153m  14m 149m S  5.5  0.2   0:15.51 php
4788 www-data  15   0  155m  16m 152m S  4.5  0.2   0:11.37 php
4809 www-data  16   0  154m  15m 149m S  4.5  0.2   0:11.07 php
4890 www-data  15   0  153m  13m 148m R  3.5  0.2   0:11.96 php
4870 www-data  16   0  153m  15m 148m S  2.6  0.2   0:12.22 php
7126 www-data  15   0  153m  14m 148m S  2.3  0.2   0:10.43 php
4945 www-data  15   0  152m  13m 148m S  1.9  0.2   0:13.35 php
4986 www-data  15   0  153m  14m 149m S  1.6  0.2   0:14.95 php
4823 www-data  15   0  152m  13m 148m S  1.3  0.2   0:14.64 php
4829 www-data  15   0  153m  13m 149m S  1.3  0.2   0:13.09 php
4879 www-data  15   0  153m  14m 148m S  1.3  0.2   0:17.27 php

strace -p pid shows only next:
mremap(0x2a9f3fa000, 1812733952, 1812733952, MREMAP_MAYMOVE) =
0x2a9f3fa000