pprof normalization errors

[paulfantom]

Originally posted as parca-dev/parca-agent#91

I do see fairly frequent log messages about pprof normalization failures.

parca-agent logs:

level=error ts=2021-10-11T09:26:15.261555856Z caller=profile.go:458 namespace=multimedia pod=radarr-0 container=radarr msg="failed to send profile" err="rpc error: code = Internal desc = failed to normalize pprof: get lines by location ID: execute SQL query: interrupted (9)"
level=error ts=2021-10-11T09:27:35.260139813Z caller=profile.go:458 namespace=multimedia pod=radarr-0 container=radarr msg="failed to send profile" err="rpc error: code = Internal desc = failed to normalize pprof: GetMappingByKey failed: interrupted (9)"

parca logs:

name=parca ts=2021-10-11T09:26:15.259434466Z caller=log.go:168 level=error protocol=grpc grpc.component=server grpc.service=parca.profilestore.v1alpha1.ProfileStoreService grpc.method=WriteRaw grpc.method_type=unary grpc.start_time=2021-10-11T09:26:15Z grpc.code=Internal grpc.error="rpc error: code = Internal desc = failed to normalize pprof: get lines by location ID: execute SQL query: interrupted (9)" grpc.time_ms=14.827 finishedcall=(MISSING)
name=parca ts=2021-10-11T09:27:35.25984088Z caller=log.go:168 level=error protocol=grpc grpc.component=server grpc.service=parca.profilestore.v1alpha1.ProfileStoreService grpc.method=WriteRaw grpc.method_type=unary grpc.start_time=2021-10-11T09:27:35Z grpc.code=Internal grpc.error="rpc error: code = Internal desc = failed to normalize pprof: GetMappingByKey failed: interrupted (9)" grpc.time_ms=7.671 finishedcall=(MISSING)