Example Queries

[taegyunkim]

Queries that outputs filter.cc file that can successfully compiled.

1. How many traces went through a particular microservice A?
   MATCH n WHERE n.service_name == A RETURN count; count is a udf function which increments a counter by a whenever we see a request

2. How many traces went through microservices A, B, and C in that order?
   MATCH x->y, y->z, WHERE x.service_name==a, y.service_name==b, z.service_name==c, RETURN count

3. Get me the name of the service with highest latency
   MATCH x WHERE x.service_name == frontend RETURN max_latency
   max_latency is a udf

Need further development

Latency

Latency is not a supported property

1. What is the average latency of an RPC from microservice A to microservice B?
   MATCH x->y WHERE x.service_name==a, y.service_name==b GROUP y.latency BY avg

2. Get me a histogram of end-to-end trace latencies or RPC latencies?
   MATCH x WHERE x.service_name == frontend GROUP x.latency BY histogram

Graph depth & and breadth

They're both graph properties and can be implemented by providing udfs.

1. Get me a histogram of trace service depths
   MATCH x WHERE x.service_name == frontend GROUP x.depth BY histogram

2. Get me a histogram of trace service breadths (the maximum fan out to child spans)
   MATCH x WHERE x.service_name == frontend GROUP x.breadth BY histogram

[taegyunkim]

More queries https://www.notion.so/taegyunk/Example-Queries-05955e4c8c304d0e9c1e173c578daf7b