Varnish performas sorunu

Arkadaşlar selamlar,

varnish kurulu bir server'da apache benchmark testi yapıyorum
ab -c 10 -n 1000 http://www.site.com.tr/
Bu tarz bir yükte bile site kasıyor yavaşlıyor.

Donanım 8 core işlemci 32gb ram ssd disk'i mevcut
Test sırasında donanımda hiç bir kıpırdama kasma yok. Site yavaşlıyor
Limitlerle alakalı olduğunu düşünüyorum fakat bulamadım

varnish.x86_64 4.1.8-1.el7 @varnish-4.1 kullanıyorum, şimdiden teşekkürler

/etc/varnish/varnish.param
# Varnish environment configuration description. This was derived from
# the old style sysconfig/defaults settings

# Set this to 1 to make systemd reload try to switch VCL without restart.
RELOAD_VCL=1
#NFILES=3310712
DAEMON_COREFILE_LIMIT="unlimited"
#MEMLOCK=8200000
#VARNISH_MAX_THREADS=100000
#VARNISH_THREAD_TIMEOUT=120
VARNISHNCSA_ENABLED=1
NFILES=-n
MEMLOCK=-l

# Set WARMUP_TIME to force a delay in reload-vcl between vcl.load and vcl.use
# This is useful when backend probe definitions need some time before declaring
# configured backends healthy, to avoid routing traffic to a non-healthy backend.
#WARMUP_TIME=0
VARNISH_TTL=120

# Main configuration file. You probably want to change it.
VARNISH_VCL_CONF=/etc/varnish/default.vcl

# Default address and port to bind to. Blank address means all IPv4
# and IPv6 interfaces, otherwise specify a host name, an IPv4 dotted
# quad, or an IPv6 address in brackets.
VARNISH_LISTEN_ADDRESS=87.98.220.184
VARNISH_LISTEN_PORT=80

# Admin interface listen address and port
VARNISH_ADMIN_LISTEN_ADDRESS=87.98.220.184
#VARNISH_ADMIN_LISTEN_PORT=6085

# Shared secret file for admin interface
VARNISH_SECRET_FILE=/etc/varnish/secret

# Backend storage specification, see Storage Types in the varnishd(5)
# man page for details.
VARNISH_STORAGE="malloc,10G"

# User and group for the varnishd worker processes
VARNISH_USER=varnish
DAEMON_OPTS=" -p workspace_client=512k -p thread_queue_limit=30000 -p thread_pools=2 -p lru_interval=60 -p listen_depth=65535 -p ping_interval=2 -p thread_pool_min==500 -p thread_pool_max=30000 -p thread_pool_timeout=300 -p thread_pool_add_delay=1"



/etc/varnish/default.vcl
.max_connections = 90000; # That's it
.interval = 5s; # check the health of each backend every 5 seconds
.timeout = 1s; # timing out after 1 second.
.window = 61; # If 3 out of the last 5 polls succeeded the backend is considered healthy, otherwise it will be marked as sick
.threshold = 2;
}
.first_byte_timeout = 300s; # How long to wait before we receive a first byte from our backend?
.connect_timeout = 600s; # How long to wait for a backend connection?
.between_bytes_timeout = 600s; # How long to wait between bytes received from our backend?


/etc/sysctl.conf
fs.file-max = 900000
net.ipv4.tcp_timestamps=1
net.ipv4.tcp_tw_recycle=0
net.ipv4.tcp_tw_reuse=1
net.ipv4.tcp_max_tw_buckets=1440000
net.ipv4.ip_local_port_range = 512 65535
net.core.somaxconn = 61440
net.core.rmem_max = 12582912
net.core.wmem_default = 31457280
net.core.wmem_max = 12582912
net.ipv4.tcp_keepalive_time = 300
net.ipv4.tcp_keepalive_probes = 5
net.ipv4.tcp_keepalive_intvl = 15
net.ipv4.tcp_fin_timeout = 15
net.ipv4.tcp_rfc1337 = 1
net.core.optmem_max = 25165824
net.ipv4.tcp_mem = 65536 131072 262144
net.ipv4.udp_mem = 65536 131072 262144
net.ipv4.tcp_rmem = 8192 87380 16777216
net.ipv4.udp_rmem_min = 66384
net.ipv4.tcp_wmem = 8192 65536 16777216
net.ipv4.udp_wmem_min = 86384
net.ipv4.xfrm4_gc_thresh = 82768



/etc/security/limits.conf
root soft nofile 100000
root hard nofile 200000
root soft memlock 100000
root hard memlock 200000