Linuxkernel. shmallshemaxshemin explains the LinuxX86-64 operating system, Oracle10g database, from 8G to 16G, the kernel. after the shmmax parameter is changed to 17179869184 (16G), it is found that as long as the sga_max_size and sga_target parameters are modified to more than 8G, Oracle will... linux kernel. shmall shemax shemin explains Linux X86-64 operating system, Oracle 10G database, from 8G to
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In this hostile society, are you still worried about the server being attacked? Still worried about the server being killed? Tell you to use the South Korea KA High-protection server, no longer worry about the server was killed. Korea KA server can provide a single anti-100G (100G udp+10g TCP), more than a shield million gigabit NP enterprise-class hardware firewall cluster, single-machine commitment to 10g/30g hard defense, beyond the defensive automatic shielding IP, attack the past immediatel
can see that our VG data is 68 Gb in totalPE size 4.00MB#### By default, each extended block is 4 MB. The size of the extended block can be adjusted using the-S parameter when creating the VG. The largest block can even be used as a parameter using t.Total PE17500#### A total of 17500 extension BlocksAlloc PE/size 15500/60 .55GB#### We have used 60 GBFree PE/size 2000/7 .81 GBVg uuid hOixVC-ljbJ-Z5QG-de9b-KFEy-PDZb-o2EDME
[Root @ vpnserv ~] #Mount#### View the current Mount status/Dev/sda2 on/t
.
netstat -an | grep LISTEN | grep tcp | grep 80Check whether a process is monitoring port 80.Use ping to monitor network connections
UsepingCommand to check whether the network is connected, use the-c option to control the number of requests, use the-w option to control the timeout (unit: milliseconds), and finally useSymbolShort CircuitFeature to control the output:
ping -w 100 -c 1 weibo.com >/dev/null echo "connected"Hard Disk
The hard disk is not a particularly important metric, but failur
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performance.There are three ways to adjust the Tmpfs size: 1. Mount directly to the desired directory-such as the system's temporary directory-the directory where you can mount a temporary file of a program according to your actual needs[Email protected] ~]# mount-t tmpfs-o size=20m tmpfs/tmp[Email protected] ~]# df-hFilesystem Size used Avail use% mounted on/dev/sda2 16G 10G 4.7G 69%//DEV/SDA1 99M 21M 74M 22%/bootTmpfs 502M 0 502M 0%/dev/shmTmpfs 20
in the next article.Add the. Getgeo point to the Simp_blkdev_getgeo in Simp_blkdev_fops, which is to change the SIMP_BLKDEV_FOPS structure to this look:struct Block_device_operations simp_blkdev_fops = {. Owner = This_module,. Getgeo = Simp_blkdev_getgeo,};The second step is difficult, but also difficult to go, in the code of the struct block_device_operations simp_blkdev_fops this line before looking for an empty point of the place, the following functions inserted into:static int Simp_blkdev_
Q: How much hard disk space does it take to install Windows 7?
A: The system completely installed footprint 7G of hard disk space, but it is recommended that Windows 7 partition free space around 15G, so more stable. Although the official installation requirements of Microsoft is more than 16G of disk space, but in fact Windows7 is not occupied so much, the requirements of 16G is the virtual memory and oth
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Kubeadm is the official installation program, more convenient than the pure manual installation.0 Preparation
Before installation, you need to make some settings to keep the system environment consistent and ensure a smooth installation behind. 0.0 Hardware Conditions
System: CentOS 7User: RootMachine Planning:
role
Quantity
Configuration
Physical IP
hostname
Master
1
4 Nuclear 16G
172.16.93.22
on your laptop, be careful, especially if the memory is small (less than 16G).
I use the notebook memory is 12G, each virtual machine 5 G, the other applications are all closed, memory has been supporting around 95%. Another colleague of a 16G memory notebook in the installation grid, multiple times at about 85% when the virtual machine restarts directly, has not been installed successfully.
of the shared memory segment is an integer multiple of the shared memory page size. The maximum size of a shared memory segment is 16G, then the number of shared memory pages is 16gb/4kb=16777216kb/4kb=4194304 (page), which is 64Bit system 16GB physical memory, set Kernel.shmall = 4194304 to meet the requirements (almost twice times the original setting 2097152). At this time can adjust the Shmmax parameter to 16
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