sync gateway - process & server stats via REST call

[househippo]

It be great to have REST call  to get sync gateway stats for a specific db and channels. Something similar to Couchbase servers /pools/default/bucktes/{bucket}/nodes/{cb-node}/stats

[househippo]

In https://github.com/couchbase/sync_gateway/blob/master/src/github.com/couchbase/sync_gateway/rest/routing.go

there are some stats here at line:

     Handle("/_stats", makeHandler(sc, adminPrivs, (*handler).handleStats)).Methods("GET")

via http://<sync_gateway_host>:4985/_stats/

[househippo]

Did a little more digging on the below GET handle. It goes to: https://github.com/couchbase/sync_gateway/blob/master/src/github.com/couchbase/sync_gateway/rest/api.go

and the built-in function below.

runtime.ReadMemStats(&st.MemStats)

so its just pulling memory profile from golang. There are some other methods that runtime also has. LINK here: https://golang.org/pkg/runtime/

I'll see if I can append some more KPIs to the _stats call.

[zgra...@gmail.com]

Fujio,

Check out `/_expvar`. There are gobs of stats there, albeit at the server level. 

For more examples, see https://github.com/zgramana/expvarmon

This console app will display perf counters as curses sparklines. You can grab binaries on the releases tab.

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[Jens Alfke]

Some of the _expvar output is documented at https://github.com/couchbase/sync_gateway/wiki/expvars

--Jens

[househippo]

Thanks Zack,

For more examples, see https://github.com/zgramana/expvarmon

That puts more structure to the stats to sync_gateway.

I was looking at this. https://github.com/shirou/gopsutil to get some other stats too. It does do to much more

I'll looking into per sync_gateway {db} & channel(s) status later.
something like http://<hostname>:4985/{db}/_

stats