@@ -50,15 +50,19 @@ systemctl list-timers | grep -P 'NEXT|pg_archive_log'
50502 . [ ` /etc/systemd/system/pg_archive_log.service ` ] ( pg_archive_log.service )
5151
5252## Тестирование сжатия
53- 53+ 54+ Исходный тестовый файл: ` postgresql-2025年09月14日.csv ` ** 186,311,281 байт** .\
55+ Сжатие и распаковка в один поток. Распаковка в ` /dev/null ` .\
56+ Для замеров длительности выполнения и потребления памяти использовалась команда ` /usr/bin/time -v COMMAND ` .
57+ 5458| Program and compression level | Compression size (bytes) | Compression size (%) | Compression duration (s) | Compression memory (KB) | Decompression duration (s) | Decompression memory (KB) | Rating place |
5559| :--- | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
5660| ` gzip -9 ` | 3,453,449 | 144% | 1.24 | 2,416 | 0.46 | 2,408 | — |
5761| ` zstd -9 ` | 2,381,965 | 100% | 1.55 | 41,580 | 0.04 | 4,220 | 3 |
58- | ` zstd -14 ` | 2,449,812 | 103% | 2.61 | 117,560 | 0.04 | 6,436 | — |
59- | ` zstd -19 ` | 1,760,829 | 74% | 77.40 | 216,512 | 0.08 | 10,444 | — |
60- | ` bzip2 -9 ` | 2,138,384 | 90% | 37.70 | 7,944 | 3.34 | 5,032 | — |
61- | ` bzip3 -b8 ` | 1,509,780 | 63% | 2.76 | 21,212 | 1.99 | 52,428 | 1 |
62- | ` bzip3 -b16 ` | 1,471,514 | 62% | 2.71 | 39,424 | 1.91 | 101,636 | 2 |
63- | ` bzip3 -b64 ` | 1,412,929 | 59% | 2.98 | 149,040 | 2.12 | 396,484 | — |
64- | ` xz -9 ` | 2,057,736 | 86% | 18,34 | 629,832 | 0.38 | 16,510 | — |
62+ | ` zstd -14 ` | 2,449,812 | 103% | 2.61 | 117,560 | 0.04 | 6,436 | — |
63+ | ` zstd -19 ` | 1,760,829 | 74% | 77.40 | 216,512 | 0.08 | 10,444 | — |
64+ | ` bzip2 -9 ` | 2,138,384 | 90% | 37.70 | 7,944 | 3.34 | 5,032 | — |
65+ | ` bzip3 -b8 ` | 1,509,780 | 63% | 2.76 | 21,212 | 1.99 | 52,428 | 1 |
66+ | ` bzip3 -b16 ` | 1,471,514 | 62% | 2.71 | 39,424 | 1.91 | 101,636 | 2 |
67+ | ` bzip3 -b64 ` | 1,412,929 | 59% | 2.98 | 149,040 | 2.12 | 396,484 | — |
68+ | ` xz -9 ` | 2,057,736 | 86% | 18,34 | 629,832 | 0.38 | 16,510 | — |
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