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pg_duckdb: Add unindexed pg_duckdb
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‎pg_duckdb/benchmark.sh

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#!/bin/bash
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set -eux
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#sudo apt-get update
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#sudo apt-get install -y docker.io
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#sudo apt-get install -y postgresql-client
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wget --continue 'https://datasets.clickhouse.com/hits_compatible/hits.tsv.gz'
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gzip -d hits.tsv.gz
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memory=$(awk '/MemTotal/ {print $2}' /proc/meminfo)
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threads=$(nproc)
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cpus=$(($threads / 2))
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# Shared buffers is set to 25% of memory in AWS RDS by default. We do the same.
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# https://docs.aws.amazon.com/prescriptive-guidance/latest/tuning-postgresql-parameters/shared-buffers.html
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shared_buffers=$(($memory / 4))
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# Effective cache size does not need to be perfect, but it should be somewhat
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# close to the total memory minus what is expected to be used for queries.
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# https://www.cybertec-postgresql.com/en/effective_cache_size-what-it-means-in-postgresql/
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effective_cache_size=$(($memory - ($memory / 4)))
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# By default, max_worker_processes is set to in postgres. We want to be able to
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# use all the threads for parallel workers so we increase it. We also add a
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# small buffer of 15 for any other background workers that might be created.
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max_worker_processes=$(($threads + 15))
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# We also give DuckDB 25% of the memory to work with.
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duckdb_memory=$(($memory / 4))
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# Below we make sure to configure the rest of the parallel worker settings to
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# match the number of cpu cores:
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# https://www.crunchydata.com/blog/postgres-tuning-and-performance-for-analytics-data
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#
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# We also increase work_mem because we are doing an analytics workload to allow
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# some more memory for sorting, aggregations, etc.
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#
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# It's necessary to increase max_wal_size to make the dataload not take very
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# long. With the default value it's constantly checkpointing, and the PG logs
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# warn you about that and tell you to increase max_wal_size.
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sudo docker run -d --name pgduck -p 5432:5432 -e POSTGRES_PASSWORD=duckdb pgduckdb/pgduckdb:17-v0.3.1
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sleep 2
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sudo docker exec -it pgduck bash -c "
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cat >> /var/lib/postgresql/data/postgresql.conf <<'EOF'
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shared_buffers=${shared_buffers}kB
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max_worker_processes=${max_worker_processes}
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max_parallel_workers=${threads}
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max_parallel_maintenance_workers=${cpus}
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max_parallel_workers_per_gather=${cpus}
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duckdb.max_workers_per_postgres_scan=${cpus}
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max_wal_size=32GB
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work_mem=64MB
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effective_cache_size=${effective_cache_size}kB
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duckdb.max_memory='${duckdb_memory}kB'
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EOF
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"
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docker restart pgduck
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export PGUSER=postgres
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export PGPASSWORD=duckdb
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sleep 5
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psql -t <create.sql
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time ./load.sh
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psql -c "ALTER DATABASE postgres SET duckdb.force_execution = true;"
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./run.sh 2>&1 | tee log.txt
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docker exec -i pgduck du -bcs /var/lib/postgresql/data
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cat log.txt | grep -oP 'Time: \d+\.\d+ ms' | sed -r -e 's/Time: ([0-9]+\.[0-9]+) ms/\1/' |
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awk '{ if (i % 3 == 0) { printf "[" }; printf $1 / 1000; if (i % 3 != 2) { printf "," } else { print "]," }; ++i; }'

‎pg_duckdb/create.sql

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CREATE TABLE hits
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(
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WatchID BIGINT NOT NULL,
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JavaEnable SMALLINT NOT NULL,
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Title TEXT NOT NULL,
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GoodEvent SMALLINT NOT NULL,
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EventTime TIMESTAMP NOT NULL,
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EventDate Date NOT NULL,
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CounterID INTEGER NOT NULL,
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ClientIP INTEGER NOT NULL,
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RegionID INTEGER NOT NULL,
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UserID BIGINT NOT NULL,
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CounterClass SMALLINT NOT NULL,
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OS SMALLINT NOT NULL,
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UserAgent SMALLINT NOT NULL,
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URL TEXT NOT NULL,
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Referer TEXT NOT NULL,
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IsRefresh SMALLINT NOT NULL,
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RefererCategoryID SMALLINT NOT NULL,
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RefererRegionID INTEGER NOT NULL,
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URLCategoryID SMALLINT NOT NULL,
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URLRegionID INTEGER NOT NULL,
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ResolutionWidth SMALLINT NOT NULL,
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ResolutionHeight SMALLINT NOT NULL,
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ResolutionDepth SMALLINT NOT NULL,
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FlashMajor SMALLINT NOT NULL,
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FlashMinor SMALLINT NOT NULL,
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FlashMinor2 TEXT NOT NULL,
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NetMajor SMALLINT NOT NULL,
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NetMinor SMALLINT NOT NULL,
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UserAgentMajor SMALLINT NOT NULL,
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UserAgentMinor VARCHAR(255) NOT NULL,
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CookieEnable SMALLINT NOT NULL,
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JavascriptEnable SMALLINT NOT NULL,
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IsMobile SMALLINT NOT NULL,
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MobilePhone SMALLINT NOT NULL,
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MobilePhoneModel TEXT NOT NULL,
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Params TEXT NOT NULL,
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IPNetworkID INTEGER NOT NULL,
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TraficSourceID SMALLINT NOT NULL,
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SearchEngineID SMALLINT NOT NULL,
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SearchPhrase TEXT NOT NULL,
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AdvEngineID SMALLINT NOT NULL,
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IsArtifical SMALLINT NOT NULL,
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WindowClientWidth SMALLINT NOT NULL,
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WindowClientHeight SMALLINT NOT NULL,
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ClientTimeZone SMALLINT NOT NULL,
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ClientEventTime TIMESTAMP NOT NULL,
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SilverlightVersion1 SMALLINT NOT NULL,
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SilverlightVersion2 SMALLINT NOT NULL,
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SilverlightVersion3 INTEGER NOT NULL,
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SilverlightVersion4 SMALLINT NOT NULL,
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PageCharset TEXT NOT NULL,
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CodeVersion INTEGER NOT NULL,
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IsLink SMALLINT NOT NULL,
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IsDownload SMALLINT NOT NULL,
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IsNotBounce SMALLINT NOT NULL,
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FUniqID BIGINT NOT NULL,
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OriginalURL TEXT NOT NULL,
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HID INTEGER NOT NULL,
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IsOldCounter SMALLINT NOT NULL,
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IsEvent SMALLINT NOT NULL,
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IsParameter SMALLINT NOT NULL,
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DontCountHits SMALLINT NOT NULL,
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WithHash SMALLINT NOT NULL,
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HitColor CHAR NOT NULL,
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LocalEventTime TIMESTAMP NOT NULL,
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Age SMALLINT NOT NULL,
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Sex SMALLINT NOT NULL,
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Income SMALLINT NOT NULL,
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Interests SMALLINT NOT NULL,
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Robotness SMALLINT NOT NULL,
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RemoteIP INTEGER NOT NULL,
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WindowName INTEGER NOT NULL,
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OpenerName INTEGER NOT NULL,
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HistoryLength SMALLINT NOT NULL,
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BrowserLanguage TEXT NOT NULL,
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BrowserCountry TEXT NOT NULL,
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SocialNetwork TEXT NOT NULL,
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SocialAction TEXT NOT NULL,
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HTTPError SMALLINT NOT NULL,
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SendTiming INTEGER NOT NULL,
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DNSTiming INTEGER NOT NULL,
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ConnectTiming INTEGER NOT NULL,
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ResponseStartTiming INTEGER NOT NULL,
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ResponseEndTiming INTEGER NOT NULL,
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FetchTiming INTEGER NOT NULL,
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SocialSourceNetworkID SMALLINT NOT NULL,
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SocialSourcePage TEXT NOT NULL,
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ParamPrice BIGINT NOT NULL,
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ParamOrderID TEXT NOT NULL,
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ParamCurrency TEXT NOT NULL,
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ParamCurrencyID SMALLINT NOT NULL,
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OpenstatServiceName TEXT NOT NULL,
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OpenstatCampaignID TEXT NOT NULL,
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OpenstatAdID TEXT NOT NULL,
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OpenstatSourceID TEXT NOT NULL,
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UTMSource TEXT NOT NULL,
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UTMMedium TEXT NOT NULL,
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UTMCampaign TEXT NOT NULL,
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UTMContent TEXT NOT NULL,
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UTMTerm TEXT NOT NULL,
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FromTag TEXT NOT NULL,
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HasGCLID SMALLINT NOT NULL,
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RefererHash BIGINT NOT NULL,
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URLHash BIGINT NOT NULL,
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CLID INTEGER NOT NULL
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);

‎pg_duckdb/load.sh

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#!/bin/bash
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set -eux
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export PGUSER=postgres
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export PGPASSWORD=duckdb
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# Load data: wrap TRUNCATE and \copy FREEZE in a single transaction
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# If we dont' do this, Postgres will throw an error:
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# "ERROR: cannot perform COPY FREEZE because the table was not created or truncated in the current subtransaction"
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# (i.e. Postgres requires that the table be either created or truncated in the current subtransaction)
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time psql <<'EOF'
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BEGIN;
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TRUNCATE TABLE hits;
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\copy hits FROM 'hits.tsv' with freeze;
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COMMIT;
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EOF
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time psql -t -c 'VACUUM ANALYZE hits'

‎pg_duckdb/queries.sql

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SELECT COUNT(*) FROM hits;
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SELECT COUNT(*) FROM hits WHERE AdvEngineID <> 0;
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SELECT SUM(AdvEngineID), COUNT(*), AVG(ResolutionWidth) FROM hits;
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SELECT AVG(UserID) FROM hits;
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SELECT COUNT(DISTINCT UserID) FROM hits;
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SELECT COUNT(DISTINCT SearchPhrase) FROM hits;
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SELECT MIN(EventDate), MAX(EventDate) FROM hits;
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SELECT AdvEngineID, COUNT(*) FROM hits WHERE AdvEngineID <> 0 GROUP BY AdvEngineID ORDER BY COUNT(*) DESC;
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SELECT RegionID, COUNT(DISTINCT UserID) AS u FROM hits GROUP BY RegionID ORDER BY u DESC LIMIT 10;
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SELECT RegionID, SUM(AdvEngineID), COUNT(*) AS c, AVG(ResolutionWidth), COUNT(DISTINCT UserID) FROM hits GROUP BY RegionID ORDER BY c DESC LIMIT 10;
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SELECT MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhoneModel ORDER BY u DESC LIMIT 10;
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SELECT MobilePhone, MobilePhoneModel, COUNT(DISTINCT UserID) AS u FROM hits WHERE MobilePhoneModel <> '' GROUP BY MobilePhone, MobilePhoneModel ORDER BY u DESC LIMIT 10;
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SELECT SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
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SELECT SearchPhrase, COUNT(DISTINCT UserID) AS u FROM hits WHERE SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY u DESC LIMIT 10;
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SELECT SearchEngineID, SearchPhrase, COUNT(*) AS c FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, SearchPhrase ORDER BY c DESC LIMIT 10;
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SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC LIMIT 10;
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SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
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SELECT UserID, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, SearchPhrase LIMIT 10;
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SELECT UserID, extract(minute FROM EventTime) AS m, SearchPhrase, COUNT(*) FROM hits GROUP BY UserID, m, SearchPhrase ORDER BY COUNT(*) DESC LIMIT 10;
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SELECT UserID FROM hits WHERE UserID = 435090932899640449;
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SELECT COUNT(*) FROM hits WHERE URL LIKE '%google%';
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SELECT SearchPhrase, MIN(URL), COUNT(*) AS c FROM hits WHERE URL LIKE '%google%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
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SELECT SearchPhrase, MIN(URL), MIN(Title), COUNT(*) AS c, COUNT(DISTINCT UserID) FROM hits WHERE Title LIKE '%Google%' AND URL NOT LIKE '%.google.%' AND SearchPhrase <> '' GROUP BY SearchPhrase ORDER BY c DESC LIMIT 10;
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SELECT * FROM hits WHERE URL LIKE '%google%' ORDER BY EventTime LIMIT 10;
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SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime LIMIT 10;
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SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY SearchPhrase LIMIT 10;
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SELECT SearchPhrase FROM hits WHERE SearchPhrase <> '' ORDER BY EventTime, SearchPhrase LIMIT 10;
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SELECT CounterID, AVG(length(URL)) AS l, COUNT(*) AS c FROM hits WHERE URL <> '' GROUP BY CounterID HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
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SELECT REGEXP_REPLACE(Referer, '^https?://(?:www\.)?([^/]+)/.*$', '\1') AS k, AVG(length(Referer)) AS l, COUNT(*) AS c, MIN(Referer) FROM hits WHERE Referer <> '' GROUP BY k HAVING COUNT(*) > 100000 ORDER BY l DESC LIMIT 25;
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SELECT SUM(ResolutionWidth), SUM(ResolutionWidth + 1), SUM(ResolutionWidth + 2), SUM(ResolutionWidth + 3), SUM(ResolutionWidth + 4), SUM(ResolutionWidth + 5), SUM(ResolutionWidth + 6), SUM(ResolutionWidth + 7), SUM(ResolutionWidth + 8), SUM(ResolutionWidth + 9), SUM(ResolutionWidth + 10), SUM(ResolutionWidth + 11), SUM(ResolutionWidth + 12), SUM(ResolutionWidth + 13), SUM(ResolutionWidth + 14), SUM(ResolutionWidth + 15), SUM(ResolutionWidth + 16), SUM(ResolutionWidth + 17), SUM(ResolutionWidth + 18), SUM(ResolutionWidth + 19), SUM(ResolutionWidth + 20), SUM(ResolutionWidth + 21), SUM(ResolutionWidth + 22), SUM(ResolutionWidth + 23), SUM(ResolutionWidth + 24), SUM(ResolutionWidth + 25), SUM(ResolutionWidth + 26), SUM(ResolutionWidth + 27), SUM(ResolutionWidth + 28), SUM(ResolutionWidth + 29), SUM(ResolutionWidth + 30), SUM(ResolutionWidth + 31), SUM(ResolutionWidth + 32), SUM(ResolutionWidth + 33), SUM(ResolutionWidth + 34), SUM(ResolutionWidth + 35), SUM(ResolutionWidth + 36), SUM(ResolutionWidth + 37), SUM(ResolutionWidth + 38), SUM(ResolutionWidth + 39), SUM(ResolutionWidth + 40), SUM(ResolutionWidth + 41), SUM(ResolutionWidth + 42), SUM(ResolutionWidth + 43), SUM(ResolutionWidth + 44), SUM(ResolutionWidth + 45), SUM(ResolutionWidth + 46), SUM(ResolutionWidth + 47), SUM(ResolutionWidth + 48), SUM(ResolutionWidth + 49), SUM(ResolutionWidth + 50), SUM(ResolutionWidth + 51), SUM(ResolutionWidth + 52), SUM(ResolutionWidth + 53), SUM(ResolutionWidth + 54), SUM(ResolutionWidth + 55), SUM(ResolutionWidth + 56), SUM(ResolutionWidth + 57), SUM(ResolutionWidth + 58), SUM(ResolutionWidth + 59), SUM(ResolutionWidth + 60), SUM(ResolutionWidth + 61), SUM(ResolutionWidth + 62), SUM(ResolutionWidth + 63), SUM(ResolutionWidth + 64), SUM(ResolutionWidth + 65), SUM(ResolutionWidth + 66), SUM(ResolutionWidth + 67), SUM(ResolutionWidth + 68), SUM(ResolutionWidth + 69), SUM(ResolutionWidth + 70), SUM(ResolutionWidth + 71), SUM(ResolutionWidth + 72), SUM(ResolutionWidth + 73), SUM(ResolutionWidth + 74), SUM(ResolutionWidth + 75), SUM(ResolutionWidth + 76), SUM(ResolutionWidth + 77), SUM(ResolutionWidth + 78), SUM(ResolutionWidth + 79), SUM(ResolutionWidth + 80), SUM(ResolutionWidth + 81), SUM(ResolutionWidth + 82), SUM(ResolutionWidth + 83), SUM(ResolutionWidth + 84), SUM(ResolutionWidth + 85), SUM(ResolutionWidth + 86), SUM(ResolutionWidth + 87), SUM(ResolutionWidth + 88), SUM(ResolutionWidth + 89) FROM hits;
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SELECT SearchEngineID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY SearchEngineID, ClientIP ORDER BY c DESC LIMIT 10;
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SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits WHERE SearchPhrase <> '' GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
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SELECT WatchID, ClientIP, COUNT(*) AS c, SUM(IsRefresh), AVG(ResolutionWidth) FROM hits GROUP BY WatchID, ClientIP ORDER BY c DESC LIMIT 10;
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SELECT URL, COUNT(*) AS c FROM hits GROUP BY URL ORDER BY c DESC LIMIT 10;
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SELECT 1, URL, COUNT(*) AS c FROM hits GROUP BY 1, URL ORDER BY c DESC LIMIT 10;
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SELECT ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3, COUNT(*) AS c FROM hits GROUP BY ClientIP, ClientIP - 1, ClientIP - 2, ClientIP - 3 ORDER BY c DESC LIMIT 10;
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SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND URL <> '' GROUP BY URL ORDER BY PageViews DESC LIMIT 10;
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SELECT Title, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND DontCountHits = 0 AND IsRefresh = 0 AND Title <> '' GROUP BY Title ORDER BY PageViews DESC LIMIT 10;
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SELECT URL, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND IsLink <> 0 AND IsDownload = 0 GROUP BY URL ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
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SELECT TraficSourceID, SearchEngineID, AdvEngineID, CASE WHEN (SearchEngineID = 0 AND AdvEngineID = 0) THEN Referer ELSE '' END AS Src, URL AS Dst, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 GROUP BY TraficSourceID, SearchEngineID, AdvEngineID, Src, Dst ORDER BY PageViews DESC LIMIT 10 OFFSET 1000;
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SELECT URLHash, EventDate, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND TraficSourceID IN (-1, 6) AND RefererHash = 3594120000172545465 GROUP BY URLHash, EventDate ORDER BY PageViews DESC LIMIT 10 OFFSET 100;
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SELECT WindowClientWidth, WindowClientHeight, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-01' AND EventDate <= '2013-07-31' AND IsRefresh = 0 AND DontCountHits = 0 AND URLHash = 2868770270353813622 GROUP BY WindowClientWidth, WindowClientHeight ORDER BY PageViews DESC LIMIT 10 OFFSET 10000;
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SELECT DATE_TRUNC('minute', EventTime) AS M, COUNT(*) AS PageViews FROM hits WHERE CounterID = 62 AND EventDate >= '2013-07-14' AND EventDate <= '2013-07-15' AND IsRefresh = 0 AND DontCountHits = 0 GROUP BY DATE_TRUNC('minute', EventTime) ORDER BY DATE_TRUNC('minute', EventTime) LIMIT 10 OFFSET 1000;

‎pg_duckdb/results/c6a.4xlarge.json

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{
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"system": "pg_duckdb",
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"date": "2025-03-05",
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"machine": "c6a.4xlarge, 500gb gp2",
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"cluster_size": 1,
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"tags": ["column-oriented", "PostgreSQL compatible"],
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"load_time": 0,
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"data_size": 0,
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"result": [
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[5.32995,2.15801,2.09045],
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[5.27475,1.82292,1.81563],
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[249.359,237.462,237.464],
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[10.2005,6.9146,6.80924],
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[12.4853,8.97217,9.00973],
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[14.4248,11.4833,11.3597],
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[8.7279,7.5938,7.5926],
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[5.29502,1.83337,1.88509],
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[13.9546,9.93488,9.92622],
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[249.438,237.569,237.546],
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[9.27199,4.77739,4.70823],
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[484.384,407.629,408.474],
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[5.5969,2.91936,2.93464],
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[16.502,6.04449,6.04522],
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[249.125,237.847,237.499],
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[12.051,9.16708,9.06759],
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[22.5604,16.604,16.4832],
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[22.1326,16.4391,16.3608],
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[250.116,238.565,237.718],
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[0.304106,0.031646,0.027524],
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[260.802,249.17,248.514],
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[249.368,237.623,237.495],
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[249.382,237.444,237.49],
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[265.968,259.974,259.748],
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[249.444,237.542,237.495],
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[5.3746,1.75421,1.64044],
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[249.481,237.479,237.582],
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[258.805,247.996,246.663],
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[251.521,242.796,241.955],
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[9.06261,6.9188,6.83185],
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[249.495,237.665,237.538],
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[249.02,237.681,237.478],
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[250.28,239.045,238.233],
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[261.416,249.3,248.081],
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[262.027,249.641,248.708],
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[25.9341,15.6849,15.8644],
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[5.50479,0.433996,0.438132],
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[5.34545,0.395093,0.391157],
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[8.14077,0.466864,0.460441],
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[5.43084,0.574749,0.56887],
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[8.04495,0.423942,0.43081],
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[8.00692,0.469748,0.462062],
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[23.2883,0.707514,0.701234]
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]
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}

‎pg_duckdb/run.sh

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#!/bin/bash
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TRIES=3
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export PGUSER=postgres
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export PGPASSWORD=duckdb
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cat queries.sql | while read -r query; do
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sync
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echo 3 | sudo tee /proc/sys/vm/drop_caches
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echo "$query"
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(
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echo '\timing'
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yes "$query" | head -n $TRIES
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) | psql --no-psqlrc --tuples-only | grep 'Time'
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done

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