Etcd observability

[ch1bo]

A few first changes to help debugging connectivity issues we saw in course of #1879.

Note that changing the msg key is not a (major) breaking change as watching is done using the msg prefix and the port parsing in matchVersion is defensively done. The version check is bound to change anyways now (not do it on each message!)

---

• CHANGELOG update not needed
• Documentation update not needed
• Haddocks updated
• No new TODOs introduced

[github-actions]

Transaction cost differences

Script summary

Name	Size (Bytes)
νInitial	-
νCommit	-
νHead	-
μHead	-
νDeposit	-

Init transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	-	-	-	-
2	-	-	-	-
3	-	-	-	-
5	-	-	-	-
10	-	-	-	-
40	-	-	-	-

Commit transaction costs

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	-	-	-	-
2	-	-	-	-
3	-	-	-	-
5	-	-	-	-
10	-	-	-	-
54	-	-	-	-

CollectCom transaction costs

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	-	-	-	-	-
2	-	-	-	-	-
3	-	-	-	-	-
4	-	-	-	-	-
5	-	-	-	-	-
6	-	-	-	-	-
7	-	-	-	-	-
8	-	-	-	-	-

Cost of Increment Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	-	-	-	-
2	-	-	-	-
3	-	+0.39	+0.09	-
5	-	$${\color{green}-0.39}$$	$${\color{green}-0.09}$$	-
10	-	$${\color{green}-0.39}$$	$${\color{green}-0.09}$$	$${\color{green}-0.01}$$
37	-	-	-	-

Cost of Decrement Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	-	-	-	-
2	-	-	-	-
3	-	-	-	-
5	-	-	-	-
10	-	-	-	-
40	-	-	-	-

Close transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	-	-	-	-
2	-	-	-	-
3	-	-	-	-
5	-	-	-	-
10	-	-	-	-
34	-	-	-	-

Contest transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	-	-	-	-
2	-	-	-	-
3	-	-	-	-
5	-	-	-	-
10	-	-	-	-
27	-	-	-	-

FanOut transaction costs

UTxO, Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
(0, 10)	-	-	-	-	-
(1, 10)	-	-	-	-	-
(5, 10)	-	-	-	-	-
(10, 10)	-	-	-	-	-
(20, 10)	-	-	-	-	-
(37, 10)	-	-	-	-	-

[github-actions]

Transaction costs

Sizes and execution budgets for Hydra protocol transactions. Note that unlisted parameters are currently using arbitrary values and results are not fully deterministic and comparable to previous runs.

Metadata
Generated at	2025-03-12 08:16:13.694194755 UTC
Max. memory units	14000000
Max. CPU units	10000000000
Max. tx size (kB)	16384

Script summary

Name	Hash	Size (Bytes)
νInitial	c8a101a5c8ac4816b0dceb59ce31fc2258e387de828f02961d2f2045	2652
νCommit	61458bc2f297fff3cc5df6ac7ab57cefd87763b0b7bd722146a1035c	685
νHead	0e35115a2c7c13c68ecd8d74e4987c04d4539e337643be20bb3274bd	14756
μHead	57166715eadb8d3135964325c016eea546c21e1c0aae974ca67df9a5*	5541
νDeposit	ae01dade3a9c346d5c93ae3ce339412b90a0b8f83f94ec6baa24e30c	1102

• The minting policy hash is only usable for comparison. As the script is parameterized, the actual script is unique per head.

Init transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	6091	11.23	3.50	0.53
2	6292	13.65	4.25	0.57
3	6496	15.28	4.73	0.59
5	6895	19.98	6.17	0.66
10	7903	31.27	9.64	0.82
40	13936	98.39	30.22	1.78

Commit transaction costs

This uses ada-only outputs for better comparability.

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	561	2.44	1.16	0.20
2	743	3.38	1.73	0.22
3	922	4.36	2.33	0.24
5	1280	6.41	3.60	0.28
10	2178	12.13	7.25	0.40
54	10063	98.61	68.52	1.88

CollectCom transaction costs

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	57	529	26.44	7.58	0.44
2	114	636	35.89	10.22	0.54
3	171	747	41.99	12.08	0.61
4	226	858	53.01	15.10	0.73
5	282	969	65.41	18.42	0.85
6	338	1081	78.81	22.05	0.99
7	393	1192	76.23	21.91	0.98
8	449	1303	87.01	24.85	1.09
9	504	1414	95.54	27.28	1.18

Cost of Increment Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	1809	25.03	8.22	0.49
2	1886	26.06	9.10	0.51
3	2021	27.24	10.17	0.53
5	2383	32.56	13.28	0.61
10	3186	43.40	20.13	0.79
38	7216	96.95	55.94	1.65

Cost of Decrement Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	632	23.95	7.61	0.43
2	697	23.80	8.20	0.43
3	868	26.37	9.58	0.47
5	1263	32.39	12.60	0.56
10	2031	42.22	18.61	0.71
36	5654	88.72	48.76	1.47

Close transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	653	30.91	9.67	0.50
2	839	31.02	10.45	0.51
3	924	34.67	12.15	0.56
5	1317	37.77	14.71	0.62
10	1931	46.14	20.50	0.76
33	5566	96.90	52.60	1.56

Contest transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	699	35.95	11.01	0.55
2	806	38.11	12.31	0.58
3	941	40.20	13.61	0.61
5	1222	44.63	16.26	0.68
10	2082	58.26	24.08	0.89
27	4418	96.34	47.09	1.46

Abort transaction costs

There is some variation due to the random mixture of initial and already committed outputs.

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	5996	28.33	9.34	0.71
2	6094	37.52	12.35	0.81
3	6276	48.04	15.87	0.93
4	6339	56.27	18.52	1.02
5	6447	62.90	20.69	1.09
6	6590	72.69	23.91	1.20
7	6701	80.00	26.36	1.28
8	6870	88.55	29.21	1.38

FanOut transaction costs

Involves spending head output and burning head tokens. Uses ada-only UTXO for better comparability.

Parties	UTxO	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
10	0	0	6091	19.66	6.46	0.62
10	1	57	6125	22.25	7.45	0.65
10	5	285	6261	30.51	10.66	0.75
10	10	566	6427	41.88	15.03	0.88
10	20	1140	6771	63.18	23.30	1.13
10	30	1708	7112	82.65	30.94	1.35
10	37	2109	7352	99.40	37.34	1.55

End-to-end benchmark results

This page is intended to collect the latest end-to-end benchmark results produced by Hydra's continuous integration (CI) system from the latest master code.

Please note that these results are approximate as they are currently produced from limited cloud VMs and not controlled hardware. Rather than focusing on the absolute results, the emphasis should be on relative results, such as how the timings for a scenario evolve as the code changes.

Generated at 2025-03-12 08:19:05.504601118 UTC

Baseline Scenario

Number of nodes	1
Number of txs	300
Avg. Confirmation Time (ms)	4.521342626
P99	7.419525419999985ms
P95	5.3432980500000005ms
P50	4.317292999999999ms
Number of Invalid txs	0

Memory data

Time	Used	Free
2025-03-12 08:17:49.60498565 UTC	904M	6216M
2025-03-12 08:17:54.60504581 UTC	1017M	6049M
2025-03-12 08:17:59.605021312 UTC	1017M	6049M
2025-03-12 08:18:04.60499977 UTC	1018M	6048M
2025-03-12 08:18:09.605063035 UTC	1022M	6044M
2025-03-12 08:18:14.604945285 UTC	1023M	6042M

Three local nodes

Number of nodes	3
Number of txs	900
Avg. Confirmation Time (ms)	29.534880531
P99	42.98605344999999ms
P95	38.80685214999999ms
P50	28.4910645ms
Number of Invalid txs	0

Memory data

Time	Used	Free
2025-03-12 08:18:28.495717173 UTC	922M	6152M
2025-03-12 08:18:33.499929584 UTC	1194M	5876M
2025-03-12 08:18:38.496905774 UTC	1252M	5756M
2025-03-12 08:18:43.495728484 UTC	1257M	5704M
2025-03-12 08:18:48.495774051 UTC	1261M	5700M
2025-03-12 08:18:53.495755731 UTC	1262M	5698M
2025-03-12 08:18:58.495818908 UTC	1267M	5692M
2025-03-12 08:19:03.495737843 UTC	1271M	5688M