85 lines
2.0 KiB
Bash
Executable File
85 lines
2.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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# CS3223 Assignment 1 Part 3 - Benchmarking PostgreSQL 17.2 (with YACLOCK replacement policy)
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# IMPORTANT: You must edit the value of PGPORT variable in settings.sh before running this script
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set -euo pipefail
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source ./settings.sh
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# file to store benchmarking results
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RESULTFILE=${ASSIGN_DIR}/part3_result.txt
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# create PGDATA directory if it's missing
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if [ ! -e ${PGDATA} ]; then
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if [ ! -d ${INSTALL_DIR}/bin ]; then
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echo "ERROR: PostgreSQL installation missing!"
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exit 1
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fi
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${INSTALL_DIR}/bin/initdb -D ${PGDATA}
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fi
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if pg_ctl status > /dev/null; then
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pg_ctl stop
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fi
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pg_ctl start -l ${LOG_FILE} -o "-p ${PGPORT} -B 8192"
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# check that server is running
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if ! pg_ctl status > /dev/null; then
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echo "ERROR: postgres server is not running!"
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exit 1;
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fi
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# if database exists, drop database
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if psql -l | grep -q "${DBNAME}"; then
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echo "Dropping database ${DBNAME} ..."
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dropdb "${DBNAME}"
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fi
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echo "Creating database ${DBNAME} ..."
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createdb "${DBNAME}"
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# check that number of shared buffer pages is configured to 64MB
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if ! psql -c "SHOW shared_buffers;" ${DBNAME} | grep "64MB"; then
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echo "ERROR: restart server using -B 8192!"
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exit 1;
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fi
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# create benchmark database relations
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NUM_CLIENTS=10
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SCALE_FACTOR=4
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DURATION=360 # 6 minutes
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pgbench -i -s ${SCALE_FACTOR} --unlogged-tables ${DBNAME}
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# show size of shared buffers
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psql -c "show shared_buffers;" ${DBNAME} >| ${RESULTFILE}
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# reset statistics counters
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psql -c "SELECT pg_stat_reset();" ${DBNAME}
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echo >> ${RESULTFILE}
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date >> ${RESULTFILE}
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echo >> ${RESULTFILE}
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# run benchmark test
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pgbench -c ${NUM_CLIENTS} -T ${DURATION} -j ${NUM_CLIENTS} -s ${SCALE_FACTOR} ${DBNAME} >> ${RESULTFILE}
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echo >> ${RESULTFILE}
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date >> ${RESULTFILE}
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echo >> ${RESULTFILE}
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# calculate buffer hit ratio
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psql -c "SELECT SUM(heap_blks_read) AS heap_read, SUM(heap_blks_hit) AS heap_hit, SUM(heap_blks_hit) / (SUM(heap_blks_hit) + SUM(heap_blks_read)) AS hit_ratio FROM pg_statio_user_tables;" ${DBNAME} >> ${RESULTFILE}
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cat ${RESULTFILE}
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