pfree

){Printf ("Get a MEM from block \ n ");Char * pfree = pmyblock-> aData + (pmyblock-> nfirst * nunitsize );// AData records the actual memory unit IDPmyblock-> nfirst = * (ushort *) pfree );Pmyblock-> nfree --;Return (void *) pfree;}Else {Printf ("Add a new block \ n ");If (! Ngrowsize)Return NULL;Pmyblock = new (ngrowsize, nunitsize) memoryblock (ngrowsize, nuni

Trends Trends.itemid Monitoring Item ID Zabbix backend system involves a large number of tables, take historical data words concerned about the few can * Monitoring Rules interpretationA configuration item similar to the following is present in the Zabbix.items table (such as network NIC monitoring, disk monitoring, etc.):Name Key_Free disk space on $ vfs.fs.size[/,free]free disk space on/(percentage) Vfs.fs.size[/,pfree]Free disk space on $ vf

solve the problem. cp/etc/skel/. Bash */home/shome/create a user in Centos, but I do not know why it is not generated in the user's default directory folder ". bash_profile ". when switching to a new user, the following problems will occur, and no shell name solution will appear: all the files in the/etc/skel directory (hidden files) copy to the user's default directory to solve the problem. because the Volume of Openstack requires an independent Volume Shard, I directly created a Volume as the

the permission mkdir/home/shomechown shome: shome/home/shome 2. copy all the files (hidden files) in the/etc/skel directory to your default directory to solve the problem. cp/etc/skel /. bash */home/shome/create a user in Centos, but I do not know why it is not generated in the user's default directory folder ". bash_profile ". when switching to a new user, the following problems will occur, and no shell name solution will appear: all the files in the/etc/skel Directory (hidden files) copy to t

]_168_102_centos ~]# pvs PV VG Fmt Attr PSize PFree /dev/xvdc1 lvm2 a-- 509.84m 509.84m /dev/xvdc2 lvm2 a-- 305.93m 305.93m /dev/xvdc3 lvm2 a-- 604.01m 604.01m[[emailprotected]_168_102_centos ~]# pvs /dev/xvdc1 PV VG Fmt Attr PSize PFree /dev/xvdc1 lvm2 a-- 509.84m 509.84m Pvdisplay [/path/to/pv_device] displays physical volume properties [[Email p

] System CPU Total load/number of online CPUs average 5min utilization percent SYSTEM.CPU.LOAD[PERCPU,AVG15] System CPU Total load/number of online CPUs average 15min utilization percent perf_counter["\processor (_total) \% User Time"] Percentage of system CPU usage time perf_counter["\processor (_total) \% Processor Time"] Percentage of system CPU usage load Disk space (amount available)

(ineedcount = 0) break; // Save the current block IndexInext = iindex;} Unlock ();Blnget = true;}}Return P;} // Release memory referenceBool cmymemorymanager: delete (lpvoid P){Byte * Pref;Int * pnext;Int inext = 1; If (P = NULL) return true; While (inext> = 1){// Clear data block content// Zeromemory (p, m_itemsize ); Lock (); // Clear referencePref = (byte *) (INT) P + m_itemsize );// Add idle data to write idle IndexesIf (* Pref! = 0){Int * pfree

,lvresize,lvs,lvdisplay　 [[email protected] ~]# pvcreate/dev/sdd{1,2}Physical volume "/DEV/SDD1" successfully created.Physical volume "/DEV/SDD2" successfully created.[Email protected] ~]# PVsPV VG Fmt Attr PSize pfree/dev/sda2 Rhel lvm2 a--/DEV/SDD1 lvm2---1.41g 1.41g/DEV/SDD2 lvm2---599.00m 599.00mMore Information View Pvdisplay[Email protected] ~]# PvscanPv/dev/sda2 VG Rhel lvm2 [Pv/dev/sde2 lvm2 [699.00 MiB]PV/DEV/SDF1 lvm2 [600.00

Create a template First Create a discovery rule in a template Mounted filesystem discovery Vfs.fs.discovery Filters for and/or {#FSTYPE} matches @File systems for discovery Project prototype 1 Free disk space on {#FSNAME} vfs.fs.size[{#FSNAME},free] Number of the non-positive Decimal digits Unit is b Both the stored value and the display value are unchanged Apply set to FileSystem Project prototype 2 Free disk space on {#FSNAME} (percentage) vfs.fs.size[{#FSNAME},

Figure: PV:/dev/sdb/dev/SDC -- PV -- VG: -- PV -- LV: -- LV --LVM command parameters: PVS, vgs, and LVS: the information is displayed briefly. Pvdisplay, vgdisplay, and lvdisplay: displays detailed information.LVM creation process: PV> VG> LV> formatting> mountingLVM usage --- create and view PV [Root @ localhost ~] # Pvcreate/dev/SD [B, c] // you can use a partition or hard disk .. pvcreate/dev/SD [B, c] 1 is the first partition of the two hard disks to create PV physical volume "/dev/SDB"

: 0x44e9daf0 Device Boot Start End Blocks Id System /Dev/sdb1 1 13054 104856223 + 83 Linux 3. LVM management settings The general steps should be as follows: First, let LVM recognize/dev/sdb1 as an available PV (Physical Volume), and then add it to VG to supplement VG resources. Expand the lv_root disk space. The current LVM situation is as follows: Lvm> vgs VG # PV # LV # SN Attr VSize VFree Vg_li6 1 3 0 wz -- n-79.51g 0 Lvm> lvs Lv vg Attr LSize Pool Origin Data % Move Log Cpy % Sync Convert L

. Here, the memory of the previous mem_reserve is changed to mem_commit to make the memory available. If the heap is not the first subheapConverts it to subheap and attaches it to subheap_list. If it is the first subheap, It is initialized to a heap, including the initialization field, building the idle queue, and initializing the critical section.. Call heap_createfreeblock () to create the first idle block of the sub-heap.2.2.2 heap_createfreeblockHeapallocate-> Rtlallocateheap-> heap_findfree

999,999 heading "lrgmb"Column tablespace_name format a20 heading "Tablespace"Column status format a3 truncatedColumn max_extents format 99999999999 heading "MaxExt"Col extent_management for a1 trunc head "M"Col allocation_type for a1 trunc head ""Col Ext_Size for a4 trunc head "Init"Column pfree format a3 trunc heading "% Fr" Break on reportCompute sum of MB on reportCompute sum of free on reportCompute sum of used on report SelectD. tablespace_name,

Zabbix Monitoring Disk capacityTwo kinds of monitoring methods:One: Monitor disk usage.Zabbix adding monitoring of disk partitionsFirst, the data on the server is mostly on/www./dev/sda8 ext4 299G 139G 146G 49%/wwwgui--Configuration--Host--Select a host--project--Create ProjectType Zabbix proxy (passive)Key value Vfs.fs.size[/www,pfree]Data type: numeric (floating point)UnitArchiveHere's what you need to explainWhat I want to monitor is the percentage

sdc, or a partition such as sda1 and sdb1VG (volume group) in a hard disk ): volume Group-a volume group consists of multiple LV, which is an abstract directory rather than a device, such as/dev/testVgLV (logic volume ): the logical volume --- LV exists in the PE, as shown in the following figure: pv:/dev/sdb/dev/sdc -- pv -- vg: -- pv -- lv: -- lv -- l V -- lv -- LVM command parameter description: pvs, vgs, lvs: are simple display of relevant information. pvdisplay, vgdisplay, and lvdisplay: D

inst_num, I. instance_name inst_nameFrom v \ $ database d,V \ $ instance I; Set term on feedback off lines 130 pagesize 999 tab off trims onColumn MB format 999,999,999 heading "Total MB"Column free format 9,999,999 heading "Free MB"Column used format 99,999,999 heading "Used MB"Column Largest format 999,999 heading "lrgmb"Column tablespace_name format a20 heading "Tablespace"Column status format a3 truncatedColumn max_extents format 99999999999 heading "MaxExt"Col extent_management for a1 trun

)Continue; -Point phit=LP; -Phit.x+=*r*cos (lp.theta+*angle); -Phit.y+=*r*sin (lp.theta+*angle); +Intpoint iphit=Map.world2map (phit); -Point pfree=LP; +pfree.x+= (*r-map.getdelta () *freedelta) *cos (lp.theta+*angle); Apfree.y+= (*r-map.getdelta () *freedelta) *sin (lp.theta+*angle); atpfree=pfree-Phit; -Intpoint ipfree=Map.world2map (pfree); - BOOLFound

cylinder BOUNDARY./DEV/SDA2 64 13 9972736 8e Linux lvmdisk/dev/mapper/vg_centos6-lv_root:9135 MB, 9135194112 bytes255 heads, sectors/track, 1 Cylindersunits = Cylinders of 16065 * 8225280 bytessector size (logical/physical): bytes/512 bytesi/o Size (minimum/optimal): bytes/512 bytesdisk identifier:0x00000000disk/dev/mapper/vg_centos6-lv_swap:1073 MB, 1073741824 bytes255 heads, sectors/track its = cylinders of 16065 * 8225280 = bytessector size (logical/physical): bytes/512 bytesi/o Size (minim