symfony - Symfony2 Sometimes Slow Dev and Production Response Time -

i have been working on new project work , have been running weird issue application takes long time return response both in dev , prod. returns response fast. read few posts on here possible reasons why none of them have solved issues.

at first thought because had few sub requests made removed still had same issues.

my average request between 20-30mb in dev. trying use profiler me figure out may coming from, every request shows longest part of request different area. example, in 1 request longest section controller, in request same page template listener, on security/firewall listener.

for example, fast request on homepage takes 116ms. wait min, refresh , takes 9467ms, or have seen take 30,000+ms.

while can live little slowness in dev mode, prod doing same things. fast, slow. apc cache enabled. doctrine queries take 4-20ms complete depending on page.

i running php 5.3 decided upgrade 5.4 see if helped, still same issues. using latest stable build of nginx. php in fpm. server running other websites no issues - both magento , symfony 1.4 web applications no issues this.

server quad dual-core 32gb of ram have plenty of resources. watching processes make requests not see abnormal cpu or memory loads.

i have yet try run application on different machine - not see why other applications working fine , 1 1 experiencing slowness this. test tonight wanted see if maybe has experienced issue before.

here snapshots profiler when request takes long time:

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here 2 when request fast expected

this composer.json

{     "name": "spliced/commerce",     "minimum-stability": "dev",     "description": "",     "autoload": {         "psr-0": { "": "src/" }     },     "require": {         "php": ">=5.3.3",         "symfony/symfony": "2.2.*",         "doctrine/orm": "2.4.*",         "doctrine/doctrine-bundle": "1.2.*",         "twig/extensions": "1.0.*@dev",         "symfony/swiftmailer-bundle": "2.2.*",         "symfony/monolog-bundle": "2.2.*",         "sensio/distribution-bundle": "2.2.*",         "sensio/framework-extra-bundle": "2.2.*",         "sensio/generator-bundle": "2.2.*",         "jms/security-extra-bundle": "1.4.*",         "jms/di-extra-bundle": "1.3.*",         "symfony/assetic-bundle": "2.1.*",         "kriswallsmith/assetic": "1.1.*@dev",         "vbardales/multiple-app-kernel-bundle": "dev-master",         "avalanche123/imagine-bundle": "v2.1",         "knplabs/knp-menu-bundle" : "dev-master",         "knplabs/knp-paginator-bundle": "dev-master",         "knplabs/knp-components": "*",         "symfony-cmf/routing-extra-bundle": "*",         "stof/doctrine-extensions-bundle" : "dev-master",         "facebook/php-sdk": "3.2.*",         "kertz/twitteroauth" : "*",         "adoy/oauth2" : "dev-master",         "guzzle/guzzle" : "dev-master",         "knplabs/knp-snappy-bundle": "dev-master",         "symfony-cmf/routing-extra-bundle" : "*",         "floriansemm/solr-bundle": "dev-master"     },     "require-dev": {         "zendframework/zendframework": "dev-master",         "elao/web-profiler-extra-bundle" : "dev-master"     },     "repositories": {         "goutte": {             "type": "package",             "package": {                 "name": "fabpot/goutte",                 "version": "dev-master",                 "source": {                     "type": "git",                     "url": "git://github.com/fabpot/goutte.git",                     "reference": "master"                 },                 "autoload": {                     "psr-0": {                         "goutte": "src/"                     }                 }             }         }     },     "scripts": {         "post-install-cmd": [             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::buildbootstrap",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::clearcache",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::installassets",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::installrequirementsfile"         ],         "post-update-cmd": [             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::buildbootstrap",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::clearcache",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::installassets",             "sensio\\bundle\\distributionbundle\\composer\\scripthandler::installrequirementsfile"         ]     },     "config": {         "bin-dir": "bin"     },     "extra": {         "symfony-app-dir": "commons",         "symfony-web-dir": "web",         "branch-alias": {             "dev-master": "2.2-dev"         }     } } 

i refer answer in (same) question:

problems symfony performance

i guess should set in php.ini 2 parameters on higher values default ones, i.e.

realpath_cache_size = 4096k  realpath_cache_ttl = 7200