From b485aab7e71c1625cfc27e0f92c9509f42378458 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 5 May 2024 13:19:16 +0200 Subject: Adding upstream version 1.45.3+dfsg. Signed-off-by: Daniel Baumann --- src/health/guides/ioping/ioping_disk_latency.md | 46 +++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/health/guides/ioping/ioping_disk_latency.md (limited to 'src/health/guides/ioping') diff --git a/src/health/guides/ioping/ioping_disk_latency.md b/src/health/guides/ioping/ioping_disk_latency.md new file mode 100644 index 000000000..cc4fdc697 --- /dev/null +++ b/src/health/guides/ioping/ioping_disk_latency.md @@ -0,0 +1,46 @@ +### Understand the alert + +This alert presents the average `I/O latency` over the last 10 seconds. `I/O latency` is the time that is required to complete a single I/O operation on a block device. + +This alert might indicate that your disk is under high load, or that the disk is slow. + +### Troubleshoot the alert + +1. Check per-process I/O usage: + + Use `iotop` to see the processes that are the main I/O consumers: + + ``` + sudo iotop + ``` + + If you don't have `iotop` installed, then [install it](https://www.tecmint.com/iotop-monitor-linux-disk-io-activity-per-process/) + +2. Analyze the running processes: + + Investigate the top I/O consumers and determine if these processes are expected to consume that much I/O, or if there might be an issue with these processes. + +3. Minimize the load by closing any unnecessary main consumer processes: + + If you find that any unnecessary or unexpected processes are heavily utilizing your disk, try stopping or closing those processes to reduce the load on the disk. Always double-check if the process you want to close is necessary. + +4. Verify your disk health: + + Make sure your disk is not facing any hardware issues or failures. For this, you can use the `smartmontools` package, which contains the `smartctl` utility. If it's not installed, you can [install it](https://www.smartmontools.org/wiki/Download). + + To check the disk health, run: + + ``` + sudo smartctl -a /dev/sdX + ``` + + Replace `/dev/sdX` with the correct disk device identifier (for example, `/dev/sda`). + +5. Consider upgrading your disk: + + If your disk consistently experiences high latency and you have already addressed any performance issues with the running processes, consider upgrading your disk to a faster drive (e.g., replace an HDD with an SSD). + +### Useful resources + +1. [iotop - Monitor Linux Disk I/O Activity](https://www.tecmint.com/iotop-monitor-linux-disk-io-activity-per-process/) +2. [smartmontools - SMART monitoring tools](https://www.smartmontools.org/) -- cgit v1.2.3