Brendan Gregg

MAY 8, 2021

An average of 434 ms is awful, and a small queue size (aqu-sz) indicates it's a problem with the disk and not the workload applied. Device r/s w/s rkB/s wkB/s rrqm/s wrqm/s %rrqm %wrqm r_await w_await aqu-sz rareq-sz wareq-sz svctm %util nvme0n1 4.40 I want to see distributions and event logs. But first, about this disk. Hit Ctrl-C to end.

Performance 133

Performance Latency Speed Systems 133

HammerDB

SEPTEMBER 24, 2024

During a copy operation, the data is transferred from the client’s file system to the Aurora PostgreSQL DB cluster. To use pgSentinel we have installed pg_stat_statements and pgsentinel and added the following to our postgresql.conf. and start the build running.

Benchmarking 68

Benchmarking Performance Metrics Database 68

Brendan Gregg

MAY 8, 2021

An average of 434 ms is awful, and a small queue size (aqu-sz) indicates it's a problem with the disk and not the workload applied. Device r/s w/s rkB/s wkB/s rrqm/s wrqm/s %rrqm %wrqm r_await w_await aqu-sz rareq-sz wareq-sz svctm %util nvme0n1 4.40 I want to see distributions and event logs. But first, about this disk. Hit Ctrl-C to end.

Performance 40

Performance Latency Speed Systems 40

Brendan Gregg

MAY 8, 2021

An average of 434 ms is awful, and a small queue size (aqu-sz) indicates it's a problem with the disk and not the workload applied. Device r/s w/s rkB/s wkB/s rrqm/s wrqm/s %rrqm %wrqm r_await w_await aqu-sz rareq-sz wareq-sz svctm %util nvme0n1 4.40 I want to see distributions and event logs. But first, about this disk. Hit Ctrl-C to end.

Performance 40

Performance Latency Speed Systems 40