FIX Apachce errors and too much memory consumption

I need to solve this apache errors and too much memory consumption (70008)Partial results are valid but processing is incomplete: [client [login to view URL]] mod_fcgid: can't get data from http client, referer: ***** ### sometimes, only when upload image or video (32)Broken pipe: [client [login to view URL]] mod_fcgid: ap_pass_brigade failed in handle_request_ipc function (9)Bad file descriptor: [client [login to view URL]] mod_fcgid: ap_pass_brigade failed in handle_request_ipc function mod_fcgid: can't apply process slot for /var/www/php-fcgi-scripts/web2/.php-fcgi-starter, referer: ***** ### VPS Config: vCPUs: 8 RAM: 16GB Ubuntu 14.04.3 LTS Apache 2.4.7 MariaDB 5.5.44 Varnish 3.0.5 PHP Version: 5.5.9-1ubuntu4.11 Server API: CGI/FastCGI max_execution_time: 60 (in some scripts ini_set('max_execution_time', 300)) memory_limit: 256M (in some scripts ini_set('memory_limit','512M')) max_input_time: 300 post_max_size: 128M PHP_FCGI_MAX_REQUESTS: 5000 ### site vhost <IfModule mod_fcgid.c> IdleTimeout 300 ProcessLifeTime 3600 # MaxProcessCount 1000 DefaultMinClassProcessCount 0 DefaultMaxClassProcessCount 100 IPCConnectTimeout 3 IPCCommTimeout 600 BusyTimeout 3600 </IfModule> ### [login to view URL] <IfModule mod_fcgid.c> FcgidConnectTimeout 120 # MaxRequestLen 50331648 FcgidProcessLifeTime 8200 FcgidIOTimeout 8200 FcgidMaxRequestLen 1073741824 FcgidMaxRequestsPerProcess 15000 FcgidMinProcessesPerClass 5 FcgidMaxProcessesPerClass 100 FcgidFixPathinfo 1 FcgidIdleTimeout 900 <IfModule mod_mime.c> AddHandler fcgid-script .fcgi </IfModule> </IfModule> ### varnish backend default { .host = "[login to view URL]"; .port = "8080"; .connect_timeout = 2s; .first_byte_timeout = 300s; .between_bytes_timeout = 300s; } # no caching for files bigger then 1MB if (beresp.http.Content-Length ~ "[0-9]{7,}" ) { set req.http.x-pipe = "1"; return (restart); } ### apache Timeout 300 MaxKeepAliveRequests 100 KeepAliveTimeout 5