g0715158 opened a new issue, #25055: URL: https://github.com/apache/pulsar/issues/25055
### Search before reporting - [x] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar. ### Read release policy - [x] I understand that [unsupported versions](https://pulsar.apache.org/contribute/release-policy/#supported-versions) don't get bug fixes. I will attempt to reproduce the issue on a supported version of Pulsar client and Pulsar broker. ### User environment version:3.0.10 jdk 17 os arm ### Issue Description When I split the snapshot and ledgers directories of the bookie from one into four, a problem arises during stress tests with 500KB large messages: file reading gets stuck, resulting in extremely low performance. At this time, IO, network, and overall CPU utilization are all low, but a single CPU core becomes fully saturated. Thread stack analysis shows that the process is blocked in the file reading phase. <!-- Failed to upload "image.png" --> <!-- Failed to upload "image.png" --> ### Error messages ```text ``` ### Reproducing the issue When I split the snapshot and ledgers directories of the bookie from one into four, a problem arises during stress tests with 500KB large messages: file reading gets stuck, resulting in extremely low performance. At this time, IO, network, and overall CPU utilization are all low, but a single CPU core becomes fully saturated. Thread stack analysis shows that the process is blocked in the file reading phase. ### Additional information _No response_ ### Are you willing to submit a PR? - [ ] I'm willing to submit a PR! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
