synapse/contrib/prometheus/synapse-v1.rules

synapse_federation_transaction_queue_pendingEdus:total = sum(synapse_federation_transaction_queue_pendingEdus or absent(synapse_federation_transaction_queue_pendingEdus)*0)
synapse_federation_transaction_queue_pendingPdus:total = sum(synapse_federation_transaction_queue_pendingPdus or absent(synapse_federation_transaction_queue_pendingPdus)*0)

synapse_http_server_request_count:method{servlet=""} = sum(synapse_http_server_request_count) by (method)
synapse_http_server_request_count:servlet{method=""} = sum(synapse_http_server_request_count) by (servlet)

synapse_http_server_request_count:total{servlet=""} = sum(synapse_http_server_request_count:by_method) by (servlet)

synapse_cache:hit_ratio_5m = rate(synapse_util_caches_cache:hits[5m]) / rate(synapse_util_caches_cache:total[5m])
synapse_cache:hit_ratio_30s = rate(synapse_util_caches_cache:hits[30s]) / rate(synapse_util_caches_cache:total[30s])

synapse_federation_client_sent{type="EDU"} = synapse_federation_client_sent_edus + 0
synapse_federation_client_sent{type="PDU"} = synapse_federation_client_sent_pdu_destinations:count + 0
synapse_federation_client_sent{type="Query"} = sum(synapse_federation_client_sent_queries) by (job)

synapse_federation_server_received{type="EDU"} = synapse_federation_server_received_edus + 0
synapse_federation_server_received{type="PDU"} = synapse_federation_server_received_pdus + 0
synapse_federation_server_received{type="Query"} = sum(synapse_federation_server_received_queries) by (job)

synapse_federation_transaction_queue_pending{type="EDU"} = synapse_federation_transaction_queue_pending_edus + 0
synapse_federation_transaction_queue_pending{type="PDU"} = synapse_federation_transaction_queue_pending_pdus + 0