一、当前1c\2g\40g ssd磁盘的监控性能
使用zabbix简单粗略统计，目前是每秒118.95个请求
二、主机性能提升
虚拟主机配置升级centos7.3 16c/8g/40g ssd 磁盘
调整后新能未见提升，有些奇怪，应主要在系统优化、zabbix参数优化、mysql优化
三、系统优化
1、
加大打开文件数的限制（open files）
[root@localhost ~]# ulimit -n
1024
[root@localhost ~]# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 23135
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 23135
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
[root@localhost ~]# vi /etc/security/limits.conf
最后添加
* soft nofile 1024000
* hard nofile 1024000
hive - nofile 1024000
hive - nproc 1024000
用户进程限制
[root@localhost ~]# sed -i 's/4096/65535/g' /etc/security/limits.d/20-nproc.conf
[root@localhost ~]# grep -E -v '^$|^#' /etc/security/limits.d/20-nproc.conf
* soft nproc 65535
root soft nproc unlimited
2、修改内核
[root@localhost ~]# vim /etc/sysctl.conf
# 关闭ipv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
# 避免放大攻击
net.ipv4.icmp_echo_ignore_broadcasts = 1
# 开启恶意icmp错误消息保护
net.ipv4.icmp_ignore_bogus_error_responses = 1
#关闭路由转发
net.ipv4.ip_forward = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
#开启反向路径过滤
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
#处理无源路由的包
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
#关闭sysrq功能
kernel.sysrq = 0
#core文件名中添加pid作为扩展名
kernel.core_uses_pid = 1
# 开启SYN洪水攻击保护
net.ipv4.tcp_syncookies = 1
#修改消息队列长度
kernel.msgmnb = 65536
kernel.msgmax = 65536
#设置最大内存共享段大小bytes
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
#timewait的数量，默认180000
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.tcp_sack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
#每个网络接口接收数据包的速率比内核处理这些包的速率快时，允许送到队列的数据包的最大数目
net.core.netdev_max_backlog = 262144
#限制仅仅是为了防止简单的DoS 攻击
net.ipv4.tcp_max_orphans = 3276800
#未收到客户端确认信息的连接请求的最大值
net.ipv4.tcp_max_syn_backlog = 262144
net.ipv4.tcp_timestamps = 0
#内核放弃建立连接之前发送SYNACK 包的数量
net.ipv4.tcp_synack_retries = 1
#内核放弃建立连接之前发送SYN 包的数量
net.ipv4.tcp_syn_retries = 1
#启用timewait 快速回收
net.ipv4.tcp_tw_recycle = 1
#开启重用。允许将TIME-WAIT sockets 重新用于新的TCP 连接
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_fin_timeout = 1
#当keepalive 起用的时候，TCP 发送keepalive 消息的频度。缺省是2 小时
net.ipv4.tcp_keepalive_time = 30
#允许系统打开的端口范围
net.ipv4.ip_local_port_range = 1024 65000
# 确保无人能修改路由表
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0
[root@localhost ~]# sysctl -p
生效
3、设置时间同步服务器，启动自动更新
[root@localhost ~]# yum install chrony
[root@localhost ~]# vi /etc/chrony.conf
1 server 0.centos.pool.ntp.org
2 server 3.europe.pool.ntp.org
systemctl enable chronyd.service
systemctl start chronyd.service
[root@localhost ~]# timedatectl set-timezone Asia/Shanghai
[root@localhost ~]# timedatectl set-time "2015-01-21 11:50:00"（可以只修改其中一个）修改日期时间
[root@localhost ~]# timedatectl 查看时间状态
[root@localhost ~]# chronyc sources -v 查看时间同步源
[root@localhost ~]# chronyc sourcestats -v
四、zabbix参数优化
# StartPollers=5
StartPollers=10
# StartIPMIPollers=0
StartIPMIPollers=5
# StartPreprocessors=3
StartPreprocessors=9
# StartPollersUnreachable=1
StartPollersUnreachable=5
# StartPingers=1
StartPingers=5
# StartDiscoverers=1
StartDiscoverers=5
# StartHTTPPollers=1
StartHTTPPollers=3
# CacheSize=8M
CacheSize=1024M
# CacheUpdateFrequency=60
CacheUpdateFrequency=120
# StartDBSyncers=4
StartDBSyncers=8
# HistoryCacheSize=16M
HistoryCacheSize=128M
# HistoryIndexCacheSize=4M
HistoryIndexCacheSize=32M
# TrendCacheSize=4M
TrendCacheSize=128M
# ValueCacheSize=8M
ValueCacheSize=128M
五、mysql优化
