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9 Megjegyzések a proc.mem elemek memtype paraméteréhez
Áttekintés
A memtype paraméter támogatott Linux, AIX, FreeBSD és Solaris platformok.
A „memtype” három közös értéke mindegyiken támogatott platformok: "pmem", "rss" és "vsize". Ezenkívül platform-specifikus A „memtype” értékeket egyes platformok támogatják.
AIX
See values supported for 'memtype' parameter on AIX in the table.
| Supported value | Description | Source in procentry64 structure | Tries to be compatible with |
|---|---|---|---|
| vsize 1 | Virtual memory size | pi_size | |
| pmem | Percentage of real memory | pi_prm | ps -o pmem |
| rss | Resident set size | pi_trss + pi_drss | ps -o rssize |
| size | Size of process (code + data) | pi_dvm | "ps gvw" SIZE column |
| dsize | Data size | pi_dsize | |
| tsize | Text (code) size | pi_tsize | "ps gvw" TSIZ column |
| sdsize | Data size from shared library | pi_sdsize | |
| drss | Data resident set size | pi_drss | |
| trss | Text resident set size | pi_trss | |
Notes for AIX:
- When choosing parameters for proc.mem[] item key on AIX, try to specify narrow process selection criteria. Otherwise there is a risk of getting unwanted processes counted into proc.mem[] result.
Example:
\$ zabbix_agentd -t proc.mem[,,,NonExistingProcess,rss]
proc.mem[,,,NonExistingProcess,rss] [u|2879488]This example shows how specifying only command line (regular expression to match) parameter results in Zabbix agent self-accounting - probably not what you want.
Do not use "ps -ef" to browse processes - it shows only non-kernel processes. Use "ps -Af" to see all processes which will be seen by Zabbix agent.
Let's go through example of 'topasrec' how Zabbix agent proc.mem[] selects processes.
\$ ps -Af | grep topasrec
root 10747984 1 0 Mar 16 - 0:00 /usr/bin/topasrec -L -s 300 -R 1 -r 6 -o /var/perf daily/ -ypersistent=1 -O type=bin -ystart_time=04:08:54,Mar16,2023proc.mem[] has arguments:
proc.mem[<name>,<user>,<mode>,<cmdline>,<memtype>]The 1st criterion is a process name (argument <name>). In our example Zabbix agent will see it as 'topasrec'. In order to match, you need to either specify 'topasrec' or to leave it empty. The 2nd criterion is a user name (argument <user>). To match, you need to either specify 'root' or to leave it empty. The 3rd criterion used in process selection is an argument <cmdline>. Zabbix agent will see its value as '/usr/bin/topasrec -L -s 300 -R 1 -r 6 -o /var/perf/daily/ -ypersistent=1 -O type=bin -ystart_time=04:08:54,Mar16,2023'. To match, you need to either specify a regular expression which matches this string or to leave it empty.
Arguments <mode> and <memtype> are applied after using the three criteria mentioned above.
FreeBSD
See values supported for 'memtype' parameter on FreeBSD in the table.
| Supported value | Description | Source in kinfo_proc structure | Tries to be compatible with |
|---|---|---|---|
| vsize | Virtual memory size | kp_eproc.e_vm.vm_map.size or ki_size | ps -o vsz |
| pmem | Percentage of real memory | calculated from rss | ps -o pmem |
| rss | Resident set size | kp_eproc.e_vm.vm_rssize or ki_rssize | ps -o rss |
| size 1 | Size of process (code + data + stack) | tsize + dsize + ssize | |
| tsize | Text (code) size | kp_eproc.e_vm.vm_tsize or ki_tsize | ps -o tsiz |
| dsize | Data size | kp_eproc.e_vm.vm_dsize or ki_dsize | ps -o dsiz |
| ssize | Stack size | kp_eproc.e_vm.vm_ssize or ki_ssize | ps -o ssiz |
Linux
See values supported for 'memtype' parameter on Linux in the table.
| Supported value | Description | Source in /proc/<pid>/status file |
|---|---|---|
| vsize 1 | Virtual memory size | VmSize |
| pmem | Percentage of real memory | (VmRSS/total_memory) * 100 |
| rss | Resident set size | VmRSS |
| data | Size of data segment | VmData |
| exe | Size of code segment | VmExe |
| hwm | Peak resident set size | VmHWM |
| lck | Size of locked memory | VmLck |
| lib | Size of shared libraries | VmLib |
| peak | Peak virtual memory size | VmPeak |
| pin | Size of pinned pages | VmPin |
| pte | Size of page table entries | VmPTE |
| size | Size of process code + data + stack segments | VmExe + VmData + VmStk |
| stk | Size of stack segment | VmStk |
| swap | Size of swap space used | VmSwap |
Notes for Linux:
- Not all 'memtype' values are supported by older Linux kernels. For example, Linux 2.4 kernels do not support
hwm,pin,peak,pteandswapvalues. - We have noticed that self-monitoring of the Zabbix agent active check process with
proc.mem[...,...,...,...,data]shows a value that is 4 kB larger than reported byVmDataline in the agent's /proc/<pid>/status file. At the time of self-measurement the agent's data segment increases by 4 kB and then returns to the previous size.
Solaris
Lásd a táblázatban a Solaris 'memtype' paraméter által támogatott értékeket.
| Támogatott érték | Leírás | Forrás a psinfo szerkezetben | Megpróbál kompatibilis lenni a következővel: |
|---|---|---|---|
| vsize 1 | Feldolgozási kép mérete | pr_size | ps -o vsz |
| pmem | A valós memória százaléka | pr_pctmem | ps -o pmem |
| rss | Rezidens készlet mérete Lehet, hogy alulbecsülik – lásd az rss leírását a "man ps"-ben. |
pr_rssize | ps -o rss |
Lábjegyzetek
1 Alapértelmezett érték.