https://github.com/eatonphil/block-tax

Is there a block tax?
https://github.com/eatonphil/block-tax

Last synced: 3 days ago
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Is there a block tax?

• Host: GitHub
• URL: https://github.com/eatonphil/block-tax
• Owner: eatonphil
• Created: 2023-12-04T14:40:51.000Z (12 months ago)
• Default Branch: main
• Last Pushed: 2023-12-04T14:45:29.000Z (12 months ago)
• Last Synced: 2024-10-13T04:13:06.153Z (about 1 month ago)
• Language: Rust
• Size: 1.95 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Block Tax

NOTE: This must be run on Linux. This will drop your page cache. Your

system will act as if there was a fork bomb but it's not a fork

bomb. It will get back to normal after you run your normal programs

once.

```

$ rustc blocktax.rs

$ ./blocktax | tee out.csv

$ duckdb -c "select column0, avg(column1) from 'out.csv' group by column0 order by avg(column1) asc"

┌──────────────────────────────┬────────────────────────┐

│           column0            │      avg(column1)      │

│           varchar            │         double         │

├──────────────────────────────┼────────────────────────┤

│ full_page_4096               │ 2.2344517999999948e-05 │

│ full_page_512                │ 2.3091620400000006e-05 │

│ partial_page_4096_6144_bytes │ 2.5642358400000015e-05 │

│ partial_page_512_20_bytes    │ 2.6037361999999975e-05 │

│ partial_page_512_768_bytes   │ 3.0276204400000106e-05 │

│ 2_full_page_4096             │ 3.2619195599999956e-05 │

│ partial_page_4096_20_bytes   │ 4.3916698800000013e-05 │

│ 2_full_page_512              │  4.912078600000008e-05 │

└──────────────────────────────┴────────────────────────┘

$ # OR WITH 90TH PERCENTILE

$ duckdb -c "select column0, quantile(column1, .9) from 'out.csv' group by column0 order by quantile(column1, .9) a

sc"

┌──────────────────────────────┬───────────────────────┐

│           column0            │ quantile(column1, .9) │

│           varchar            │        double         │

├──────────────────────────────┼───────────────────────┤

│ full_page_4096               │            2.1768e-05 │

│ full_page_512                │             2.343e-05 │

│ partial_page_4096_6144_bytes │            2.6171e-05 │

│ partial_page_4096_20_bytes   │             3.998e-05 │

│ partial_page_512_20_bytes    │            4.3407e-05 │

│ partial_page_512_768_bytes   │            5.2008e-05 │

│ 2_full_page_512              │            7.8828e-05 │

│ 2_full_page_4096             │            7.9737e-05 │

└──────────────────────────────┴───────────────────────┘

```