posix_memalign(16, 16384) failed (12: Cannot allocate memory)

[JohnCarne]

sysctl tweaked at maximum already

# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.

# Tweak for nginx workers/connections added 16/09/2016 for issue
investigation on pisix error in nginx logs
net.core.somaxconn = 512
net.core.netdev_max_backlog = 512
net.ipv4.tcp_max_syn_backlog = 20480

# Tweaks added 16/09/2016 for issue investigation on pisix error in nginx
logs
net.netfilter.nf_conntrack_max = 196608
net.nf_conntrack_max = 196608

# Tweaks added 19/09/2016 cloudlinux
vm.max_map_count=655300

# Tweaks added 20/09/2016
net.core.rmem_default=262144
net.core.wmem_default=262144
net.core.rmem_max=262144
net.core.wmem_max=262144

# Controls IP packet forwarding
net.ipv4.ip_forward = 0

# Controls source route verification
net.ipv4.conf.default.rp_filter = 1

# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0

# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0

# Decrease the time default value for tcp_fin_timeout connection
net.ipv4.tcp_fin_timeout = 15

# Decrease the time default value for tcp_keepalive_time connection
net.ipv4.tcp_keepalive_time = 1800

# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1

# Enable TCP SYN Cookie Protection
net.ipv4.tcp_syncookies = 1

# Increase the tcp-time-wait buckets pool size
net.ipv4.tcp_max_tw_buckets = 1440000

# Turn off the tcp_sack
net.ipv4.tcp_sack = 0

# Turn off the tcp_timestamps
net.ipv4.tcp_timestamps = 0

# Controls the default maxmimum size of a mesage queue
kernel.msgmnb = 65536

# Controls the maximum size of a message, in bytes
kernel.msgmax = 65536

# Controls the maximum shared segment size, in bytes
kernel.shmmax = 68719476736

# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 4294967296

# Disable IPv6 autoconf 
net.ipv6.conf.all.autoconf = 0
net.ipv6.conf.default.autoconf = 0
net.ipv6.conf.eth0.autoconf = 0
net.ipv6.conf.all.accept_ra = 0
net.ipv6.conf.default.accept_ra = 0
net.ipv6.conf.eth0.accept_ra = 0

# Various
vm.swappiness = 1
vm.disable_fs_reclaim=1
vm.dirty_background_ratio = 5
vm.dirty_ratio = 10

#Disable CloudLinux ptrace
kernel.user_ptrace = 0

# Symlinks
fs.enforce_symlinksifowner = 1
fs.symlinkown_gid = 99

# CageFS
fs.proc_super_gid = 485
fs.proc_can_see_other_uid=0
fs.suid_dumpable=1

# SecureLinks Link Traversal Protection Allowd Group Id
fs.protected_symlinks_allow_gid = 487
fs.fs.protected_hardlinks_allow_gid = 487
fs.file-max = 1048576

fs.protected_symlinks_create = 0
fs.protected_hardlinks_create = 0

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,269787,269792#msg-269792