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一、基础篇
1.1 JVM
1.1.1. Java内存模型，Java内存管理，Java堆和栈，垃圾回收
http://www.jcp.org/en/jsr/detail?id=133
http://ifeve.com/jmm-faq/
1.1.2. 了解JVM各种参数及调优
1.1.3. 学习使用Java工具
jps, jstack, jmap, jcon…
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Hi,
I am working on Greatest/Least function for PrestoSQL in Velox. In current PrestoDB implementations, Greatest/Least Function only checks NaN on DOUBLE data types.
``` java
@UsedByGeneratedC…
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In `tpcds/q95` `web_sales` table is scanned multiple times. Additionally, that table is then distributed across nodes using same hash column:
```
Fragment 12 [SOURCE]
CPU: 2.63m, Scheduled: 4…
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Currently the first projection column is taken as the bucketing column for cte materialization. However it makes more sense to implement random bucketing instead since that will remove skew from reade…
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example failure: https://app.circleci.com/pipelines/github/prestodb/presto/17128/workflows/75e87d3d-61cf-4f44-bc5d-ed355fdb0884/jobs/67544
```
9: E20240624 16:06:09.054556 6425 Exceptions.h:67] Lin…
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## Your Environment
* Presto version used: Latest github repo
* Storage (HDFS/S3/GCS..): local
* Data source and connector used: n/a
* Deployment (Cloud or On-prem): in-prem
* [Pastebin](…
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java: heap memory consumption
version: 9.4
There is an issue regarding the implementation of ortools-java classes `com.google.ortools.linearsolver.MPConstraint` and `com.google.ortools.linearsolve…
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Document all the currently supported SQL operations for postgresql connector along with an example similar to https://prestodb.io/docs/current/connector/iceberg.html#sql-support
## Expected Behavio…
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Advancing Velox is failing: https://github.com/prestodb/presto/pull/22516
The recent boost upgrade https://github.com/facebookincubator/velox/pull/9094 to 1_77 is likely conflicting
with the CI ima…
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