Linux System Tuning Basics

Linux System tuning Basics

#显示进行在哪个cpu上运行

[Email protected] ~]# PS Axo PSR,

2 NTPD

1 Qpidd

3 Pickup

3 sshd

0 Bash

2 Pscomm

#显示进行在哪个cpu上运行, and show the PID of the process

[Email protected] ~]# PS Axo psr,comm,pid

2 ntpd 3775

1 Qpidd 9998

3 Pickup 26239

2 sshd 26448

1 Bash 26450

1 PS 26496

#绑定进程号为9998的进程到第四颗CPU上

[[email protected] ~]# Taskset-p-C 3 9998

PID 9998 ' s current affinity list:0-3

PID 9998 ' s new affinity List:3

#绑定进程号为3775的进程到第一或第二颗CPU上

[[email protected] ~]# Taskset-p-C 3775

PID 3775 ' s current affinity list:0-3

PID 3775 ' s new affinity list:1,2

Note: This command is valid only for the current process and is not valid after a restart

#显示中断

[Email protected] ~]# cat/proc/interrupts

Linux System tuning Basics

[[email protected] ~]# sar-p all 1

[Email protected] ~]# iostat-c 1

[Email protected] ~]# Vmstat 1

Linux System tuning Basics

#释放缓存

[Email protected] vm]# echo 1 >/proc/sys/vm/drop_caches

[Email protected] ~]# cd/sys/block/sda/

[email protected] sda]# ls queue//2\:0\:0\:0/block/sda/

Add_random iostats minimum_io_size Rotational

Discard_granularity logical_block_size nomerges rq_affinity

Discard_max_bytes max_hw_sectors_kb Nr_requests Scheduler

Discard_zeroes_data max_sectors_kb optimal_io_size Unpriv_sgio

Hw_sector_size max_segments Physical_block_size

iosched max_segment_size read_ahead_kb

[[email protected] sda]# ls queue/iosched/

Back_seek_max Fifo_expire_sync low_latency Slice_async_rq

Back_seek_penalty Group_idle Quantum Slice_idle

Fifo_expire_async group_isolation Slice_async Slice_sync

#显示磁盘调度算法

[email protected] sda]# cat Queue/scheduler

NoOp anticipatory deadline [CFQ]

#更改磁盘调度算法

[Email protected] sda]# echo Deadline > Queue/scheduler

[email protected] sda]# cat Queue/scheduler

NoOp anticipatory [deadline] Cfq

[[email protected] sda]# ls queue/iosched/

Fifo_batch front_merges read_expire Write_expire writes_starved

[Email protected] sda]# echo CFQ > Queue/scheduler

[[email protected] sda]# ls queue/iosched/

Back_seek_max Fifo_expire_sync low_latency Slice_async_rq

Back_seek_penalty Group_idle Quantum Slice_idle

Fifo_expire_async group_isolation Slice_async Slice_sync

This article is from the "Chase Dream" blog, please be sure to keep this source http://sihua.blog.51cto.com/377227/1893019

Linux System Tuning Basics