For latency-sensitive applications, lower the value of this parameter and limit the command queue depth on the storage so that write-back I/O cannot fill the device queue with write requests. When the device queue fills, other processes attempting to perform I/O operations are put to sleep u...
nr_requests 是在 queue 目录下面 但是queue_depth 其实是在 device 目录下面. 也就是说 队列的数量 其实是 队列的属性 队列的深度, 更像是设备的属性. 设备支持的深度的情况. 很多linux 发行版默认的数值是 1014 cat /sys/block/sda/device/queue_depth 如果设备有余力可以适当改大这个参数. 能够更好的实现...
# echo 1024 > /sys/block/dm-1/queue/nr_requests -bash: echo: write error: Invalid argument Environment Red Hat Enterprise Linux 6, 7, 8 Subscriber exclusive content A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more. Current Customers and Partners ...
cat /sys/block/vdb/queue/scheduler noop [deadline] cfq 修改 echo deadline > /sys/block/hda/queue/scheduler 或者修改启动参数 grub.conf elevator=deadline 从很多测试结果来看,数据库使用deadline调度,性能会更稳定一些。 其他 1. 关闭透明大页 2. 禁用NUMA 3. SSD的对齐 高并发 Linux Linux 内核...
Please acknowledge the following before creating a ticket I have read the GitHub issues section of REPORTING-BUGS. Description of the bug: Section and write there that with nr_files=1 this issue doesnt occur Environment: Red Hat Enterpri...
https://github.com/cfsego/ngx_log_if;dogit clone --depth 1"$i"done#Other modules:#https://github.com/arut/nginx-rtmp-module Build Nginx cd/usr/local/src/nginx-${ngx_version}/master#You can also build Nginx without 3rd party modules../configure --prefix=/etc/nginx \ ...
of Order Delivery Link Global PDCP T Reordering Timer Link Global Ver 12.2 8 Proportional Fair Max Throughput Fair Scheduling 120 ms - 40960 ms True / False 50/150/300/500/750/ 1500 True / False 0-500ms equal portion to each queue in circular order, handling all processes without priority...
命令: echo xxx > /sys/block//queue/nr_requests,nr_requests的大小设置至少是/sys/block//device/queue_depth的两倍,所以,修改nr_requtests的时候要注意。 [root@node-1 ~]# cat /sys/block/sdj/queue/nr_requests 256 [root@node-1 ~]# cat /sys/block/sdj/device/queue_depth ...
# echo 512 > /sys/block/nvme1/queue/nr_requests -bash: echo: write error: Invalid argument 决议 As nvme devices do not use the regular IO scheduler mechanism used by sd devices, the nr_request parameter is not applicable to nvme stack. The IO handling mechanism in nvme ...