Introduction
Optimizing and monitoring the performance of your Linux kernel is absolutely key to achieving the highest performance from your ClickHouse cluster. In this article we explore how to use a simple python script to monitor the disk I/O matrix of the Linux kernel.
Python Script to Monitor Linux Disk I/O Matrix
import psutil
import mysql.connector
# Connect to the ClickHouse database
cnx = mysql.connector.connect(user='<username>', password='<password>', host='<hostname>', port='<port>', database='<database>')
cursor = cnx.cursor()
def monitor_disk_io_usage():
disk_io = psutil.disk_io_counters()
# Get read_count
read_count = disk_io.read_count
# Get write_count
write_count = disk_io.write_count
# Get read_bytes
read_bytes = disk_io.read_bytes
# Get write_bytes
write_bytes = disk_io.write_bytes
# Insert disk I/O usage into ClickHouse database
query = f"INSERT INTO disk_io_usage (read_count, write_count, read_bytes, write_bytes) VALUES ({read_count}, {write_count}, {read_bytes}, {write_bytes})"
cursor.execute(query)
cnx.commit()
while True:
monitor_disk_io_usage()
# Close the cursor and connection
cursor.close()
cnx.close()
Script Explanation
Conclusion
To know more about Linux in ClickHouse, please do consider reading the below articles:
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