topic Garbage collector graph for heap usage in Monitoring Splunk

Garbage collector graph for heap usage

kmahamkali — Tue, 05 Jun 2018 22:18:39 GMT

I am trying to create a dashboard for Heap analysis. There I would like to plot a line graph with a time taken for Full gc. So I extracted 3 feilds 1.Afg: memory after full Gc 2. Memory Before Full Gc 3. Tfg: time taken for full Gc. My data looks like this

_time Bfg (in bytes) Afg((iin bytes) Tfg in Sec
2018-06-05T01:41:59.882-0700 3827336 2714566 13.974176
2018-06-05T14:12:27.501-0700 3464646 2852415 14.039128
2018-05-25T01:32:57.757-0700 3802706 2080387 10.89727
2018-05-15T10:20:43.301-0700 3400723 1793472 9.449684
2018-05-17T02:36:08.789-0700 2946767 1731755 9.05516

I wanted to plot line graph for BFG and AFG and show the Tfg values on the Afg line at the corresponding values.
Please find the attached line graph for reference.

Can some one help me with the SPL?

Re: Garbage collector graph for heap usage

kmahamkali — Mon, 11 Jun 2018 17:34:13 GMT

Any recommendations?

Re: Garbage collector graph for heap usage

Sukisen1981 — Tue, 12 Jun 2018 17:19:44 GMT

Hi,

You will need to tweak things a little for the scale issue on the y axis. Divide your bytes by 10 ^6 to convert them to GB first, if that is acceptable try something like this | eval bfg_gb= round(Bfg (in bytes)/1000000,1) |eval afg_gb= round(afg (in bytes)/1000000,1)|eval tfg=round(tfg,1)| chart values(bfg_gb),values(afg_gb),values(tfg) by _time

Check the output, is this similar to what you need?

Re: Garbage collector graph for heap usage

kmahamkali — Thu, 14 Jun 2018 20:26:08 GMT

Awesome that works

Re: Garbage collector graph for heap usage

Sukisen1981 — Fri, 15 Jun 2018 09:11:19 GMT

hi @kmahamkali , if the answer is satisfactory, please accept the answer