fix: improve performance on /account/balance for addresses with large transactions count (low effort improvements)

[matiwinnetou]

This PR tries to do some "quick wins" without actually denormalising the data or changing the query, more drastic approaches we can try out post 1.2.7 release version.

POST /account/balance
{
    "network_identifier": {
        "blockchain": "cardano",
        "network": "mainnet"
    },
    "account_identifier": {
        "address": "addr1v804tgee0m3ww7z93zh64wr9flqh9psdhnxg6cykfudgulg6f633p",
        "metadata": {}
    }
}

2025-04-09 16:01:59.674 UTC [4055] LOG:  duration: 1599.280 ms  plan:
        Query Text: select aue1_0.output_index,aue1_0.tx_hash,aue1_0.amounts,aue1_0.block,aue1_0.owner_addr,aue1_0.owner_stake_addr from address_utxo aue1_0 where aue1_0.owner_addr=$1 and not exists(select 1 from tx_input tie1_0 where tie1_0.tx_hash=aue1_0.tx_hash and tie1_0.output_index=aue1_0.output_index and tie1_0.spent_at_block<=$2) and aue1_0.block<=$3
        Gather  (cost=5513.64..523753.79 rows=277 width=474) (actual time=1368.904..1599.253 rows=5 loops=1)
          Workers Planned: 6
          Workers Launched: 6
          Buffers: shared hit=2297508
          ->  Nested Loop Anti Join  (cost=5313.64..523539.94 rows=46 width=474) (actual time=1345.803..1345.806 rows=1 loops=7)
                Buffers: shared hit=2297508
                ->  Parallel Bitmap Heap Scan on address_utxo aue1_0  (cost=5312.95..472751.51 rows=67964 width=474) (actual time=301.092..524.717 rows=54550 loops=7)
                      Recheck Cond: ((owner_addr)::text = 'addr1v804tgee0m3ww7z93zh64wr9flqh9psdhnxg6cykfudgulg6f633p'::text)
                      Filter: (block <= '11713661'::bigint)
                      Heap Blocks: exact=47562
                      Buffers: shared hit=255908
                      ->  Bitmap Index Scan on idx_address_utxo_owner_addr  (cost=0.00..5211.00 rows=407827 width=0) (actual time=55.382..55.383 rows=381848 loops=1)
                            Index Cond: ((owner_addr)::text = 'addr1v804tgee0m3ww7z93zh64wr9flqh9psdhnxg6cykfudgulg6f633p'::text)
                            Buffers: shared hit=503
                ->  Index Only Scan using idx_input_tx_out_spent_block on tx_input tie1_0  (cost=0.70..2.07 rows=2 width=69) (actual time=0.015..0.015 rows=1 loops=381848)
                      Index Cond: ((tx_hash = (aue1_0.tx_hash)::text) AND (output_index = aue1_0.output_index) AND (spent_at_block <= '11713661'::bigint))
                      Heap Fetches: 11
                      Buffers: shared hit=2041600
        JIT:
          Functions: 63
          Options: Inlining true, Optimization true, Expressions true, Deforming true
          Timing: Generation 7.380 ms, Inlining 340.248 ms, Optimization 682.257 ms, Emission 448.722 ms, Total 1478.607 ms

POST /account/balance
{
    "network_identifier": {
        "blockchain": "cardano",
        "network": "mainnet"
    },
    "account_identifier": {
        "address": "Ae2tdPwUPEYwNguM7TB3dMnZMfZxn1pjGHyGdjaF4mFqZF9L3bj6cdhiH8t",
        "metadata": {}
    }
}

2025-04-09 16:05:21.743 UTC [4345] LOG:  duration: 3120.305 ms  plan:
        Query Text: select aue1_0.output_index,aue1_0.tx_hash,aue1_0.amounts,aue1_0.block,aue1_0.owner_addr,aue1_0.owner_stake_addr from address_utxo aue1_0 where aue1_0.owner_addr=$1 and not exists(select 1 from tx_input tie1_0 where tie1_0.tx_hash=aue1_0.tx_hash and tie1_0.output_index=aue1_0.output_index and tie1_0.spent_at_block<=$2) and aue1_0.block<=$3
        Gather  (cost=6467.33..615053.93 rows=327 width=474) (actual time=1401.061..3118.488 rows=329 loops=1)
          Workers Planned: 6
          Workers Launched: 6
          Buffers: shared hit=2431245 read=1045393
          ->  Nested Loop Anti Join  (cost=6267.33..614837.58 rows=54 width=474) (actual time=1322.627..2840.679 rows=47 loops=7)
                Buffers: shared hit=2431245 read=1045393
                ->  Parallel Bitmap Heap Scan on address_utxo aue1_0  (cost=6266.64..554937.39 rows=80163 width=474) (actual time=424.648..1246.254 rows=82133 loops=7)
                      Recheck Cond: ((owner_addr)::text = 'Ae2tdPwUPEYwNguM7TB3dMnZMfZxn1pjGHyGdjaF4mFqZF9L3bj6cdhiH8t'::text)
                      Filter: (block <= '11713661'::bigint)
                      Heap Blocks: exact=92383
                      Buffers: shared hit=16 read=546628
                      ->  Bitmap Index Scan on idx_address_utxo_owner_addr  (cost=0.00..6146.39 rows=481026 width=0) (actual time=108.797..108.798 rows=575044 loops=1)
                            Index Cond: ((owner_addr)::text = 'Ae2tdPwUPEYwNguM7TB3dMnZMfZxn1pjGHyGdjaF4mFqZF9L3bj6cdhiH8t'::text)
                            Buffers: shared hit=1 read=513
                ->  Index Only Scan using idx_input_tx_out_spent_block on tx_input tie1_0  (cost=0.70..2.06 rows=2 width=69) (actual time=0.019..0.019 rows=1 loops=574929)
                      Index Cond: ((tx_hash = (aue1_0.tx_hash)::text) AND (output_index = aue1_0.output_index) AND (spent_at_block <= '11713661'::bigint))
                      Heap Fetches: 48117
                      Buffers: shared hit=2431229 read=498765
        JIT:
          Functions: 63
          Options: Inlining true, Optimization true, Expressions true, Deforming true
          Timing: Generation 7.344 ms, Inlining 330.803 ms, Optimization 654.584 ms, Emission 430.546 ms, Total 1423.277 ms

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[matiwinnetou]

We agreed not to merge this but add a special documentation page to Docusaurs related to Rosetta + Postgres performance / scalability tuning for clients using Rosetta. Clients can indices and partial indices based on their individual needs.