性能优化
A-Tune
A-Tune 是一款基于AI的操作系统性能调优引擎。A-Tune 利用 AI 技术，使操作系统“懂”业务，简化 IT 系统调优工作的同时，让应用程序发挥出色性能。
安装
# dnf -y install atune
# systemctl start atuned
快速使用指南
目前 Atune 已经内置了几个针对不同应用场景的优化方案，可以通过命令直接激活优化。
主要使用以下两个命令：
| 命令 | 说明 |
|---|---|
| atune-adm list | 查询现有优化配置方案。 |
| atune-adm profile | 激活优化配置方案。 |
更多参数说明：
[root@localhost ~]# atune-adm
NAME:
atune-adm - atune-adm is a command line client for atuned AI tuning system
USAGE:
atune-adm [global options] command [command options] [arguments...]
VERSION:
0.2
COMMANDS:
analysis analysis system workload type
check check system basic information
collection collect the system data for training
define create a new workload type
info display profile info corresponding to specified workload type
list list support workload type
profile active the specified workload type and check the actived workload type
rollback rollback to the system init state
train train a new model with self collected data
tuning dynamic bayes search optimal parameter sets
undefine delete the specified workload type
update update the optimization content of the specified workload type and profile name
upgrade upgrade the database
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
--address value, -a value atuned address (default: "/var/run/atuned/atuned.sock")
--port value, -p value atuned port
--help, -h show help
--version, -v print the version
1. 查看目前支持的优化方案
[root@localhost ~]# atune-adm list
Support WorkloadTypes:
+-----------------------------------+------------------------+-----------+
| WorkloadType | ProfileName | Active |
+===================================+========================+===========+
| default | default | true |
+-----------------------------------+------------------------+-----------+
| webserver | ssl_webserver | false |
+-----------------------------------+------------------------+-----------+
| big_database | database | false |
+-----------------------------------+------------------------+-----------+
| big_data | big_data | false |
+-----------------------------------+------------------------+-----------+
| in-memory_computing | in-memory_computing | false |
+-----------------------------------+------------------------+-----------+
| in-memory_database | in-memory_database | false |
+-----------------------------------+------------------------+-----------+
| single_computer_intensive_jobs | compute-intensive | false |
+-----------------------------------+------------------------+-----------+
| communication | rpc_communication | false |
+-----------------------------------+------------------------+-----------+
| idle | default | false |
+-----------------------------------+------------------------+-----------+
2. 激活优化方案
| 命令 | 优化方案 |
|---|---|
| atune-adm profile | big_database |
[root@localhost ~]# atune-adm profile big_database
[ SUCCESS] Bootloader iommu.passthrough
[ FAILED ] Chip Command '['/usr/libexec/atuned/scripts/prefetch/set.sh', 'off']' returned non-zero exit status 3.
[ SUGGEST] OS relogin into the system to enable limits setting
[ SUCCESS] OS vm.swappiness,kernel.sched_cfs_bandwidth_slice_us,kernel.sched_migration_cost_ns,kernel.sched_latency_ns,kernel.sched_min_granularity_ns,kernel.sched_nr_migrate,kernel.sched_wakeup_granularity_ns,net.core.rmem_default,net.core.rmem_max,net.core.wmem_default,net.core.wmem_max,net.ipv4.tcp_rmem,net.ipv4.tcp_wmem,net.core.dev_weight,net.ipv4.tcp_max_syn_backlog,net.core.somaxconn
[ SUCCESS] OS kernel/mm/transparent_hugepage/defrag,kernel/mm/transparent_hugepage/enabled,block/sda/queue/read_ahead_kb,block/sda/queue/scheduler
[ SUCCESS] OS root.hard.nofile,root.soft.nofile
[ SUCCESS] Service sysmonitor,irqbalance
[ SUGGEST] affinity bind network interrupts to its affinity numa node
[ SUGGEST] filesystem use xfs as filesystem and mount-option using noatime and nobarrier
3. 查看激活状态
[root@localhost ~]# atune-adm list
Support WorkloadTypes:
+-----------------------------------+------------------------+-----------+
| WorkloadType | ProfileName | Active |
+===================================+========================+===========+
| default | default | false |
+-----------------------------------+------------------------+-----------+
| webserver | ssl_webserver | false |
+-----------------------------------+------------------------+-----------+
| big_database | database | true |
+-----------------------------------+------------------------+-----------+
| big_data | big_data | false |
+-----------------------------------+------------------------+-----------+
| in-memory_computing | in-memory_computing | false |
+-----------------------------------+------------------------+-----------+
| in-memory_database | in-memory_database | false |
+-----------------------------------+------------------------+-----------+
| single_computer_intensive_jobs | compute-intensive | false |
+-----------------------------------+------------------------+-----------+
| communication | rpc_communication | false |
+-----------------------------------+------------------------+-----------+
| idle | default | false |
+-----------------------------------+------------------------+-----------+
FAQ
systemctl start atuned启动失败运行命令
mkdir -p /var/run/atuned/创建将要使用的目录。