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I was trying improve my librenms performance for last couple months and I feel strange when I setup distributed pollers by following the Librenms Docs. would be appreciated if you could point me the right way.
currently there are about 400 devices and 7000 ports. we have 1 main server and 2 poller servers for dedicated sites.
we have installed rrdcached and memcached as recommended in Librenms Performance Docs. however, it is noticed that the dedicated poller even slower due to the long distance.
when I poll the device from the poller, the result is:
./poller.php 176 2018-06-23 09:03:24 - 1 devices polled in 156.0 secs SNMP [62/5.84s]: Get[23/0.95s] Getnext[0/0.00s] Walk[39/4.88s] MySQL [364/98.79s]: Cell[21/5.26s] Row[23/5.82s] Rows[51/16.64s] Column[2/0 RRD [366/49.30s]: Update[183/0.05s] Create [0/0.00s] Other[183/49.25s]
when I poll from the main server, the result is:
./poller.php 176 2018-06-24 07:44:05 - 1 devices polled in 74.91 secs SNMP [61/64.94s]: Get[22/5.90s] Getnext[0/0.00s] Walk[39/59.04s] MySQL [364/0.16s]: Cell[21/0.01s] Row[23/0.00s] Rows[51/0.03s] Column[2/0.00s] Update[265/0.12s] Insert[2/0.00s] Delete[0/0.00s] RRD [366/0.27s]: Update[183/0.02s] Create [0/0.00s] Other[183/0.26s]
the snmp query from poller is quicker but MySQL and RRD is much slower , that cause the whole poller process is much slower on poller ( 156s vs 74s). Is this normal?
I have installed memcached and rrdcached and they both seems receiving and responding correctly. did I miss anything or somewhere I misunderstood?
Here is the output of validate.php:
-bash-4.2$ ./validate.php ==================================== Component | Version --------- | ------- LibreNMS | 1.40 DB Schema | 251 PHP | 7.0.30 MySQL | 5.5.56-MariaDB RRDTool | 1.6.0 SNMP | NET-SNMP 5.7.2 ==================================== [OK] Composer Version: 1.6.5 [OK] Dependencies up-to-date. [OK] Database connection successful [OK] Database schema correct
Thanks and regards,