Please read the error messages, they are different from the one reported in this topic:
> child pid 4373 exit signal Segmentation fault (11)
> child pid 4384 exit signal Segmentation fault (11)
See: [piwik.org]
> ( ! ) Fatal error: Allowed memory size of 4294967296 bytes exhausted (tried to allocate 72 bytes) in /var/wwwc/piwik/core/DataTable.php on line 1317
See [piwik.org]
> child pid 4373 exit signal Segmentation fault (11)
> child pid 4384 exit signal Segmentation fault (11)
See: [piwik.org]
> ( ! ) Fatal error: Allowed memory size of 4294967296 bytes exhausted (tried to allocate 72 bytes) in /var/wwwc/piwik/core/DataTable.php on line 1317
See [piwik.org]