Have the incremental upgrade process use less RAM (#6876) · Issues · tails / tails

Have the incremental upgrade process use less RAM

Originally created by @intrigeri on #6876 (Redmine)

As part of this work, we should update some hardcoded constants:

memory_needed and space_needed in Tails::IUK::Frontend (the very goal of this work is to decrease these values)
MIN_AVAILABLE_MEMORY in config/chroot_local-includes/usr/local/bin/tails-upgrade-frontend-wrapper (since #17152 (closed) was done, likely the Upgrader can work with less free memory)

Feature Branch: feature/15281-single-squashfs-diff, iuk:feature/11131-endless-upgrade, iuk:feature/15281-single-squashfs-diff

Attachments

Parent Task: #15283 (closed)

Subtasks

#17152 (closed)

Related issues

Related to #6877 (closed)
Related to #10115 (closed)
Related to #9373 (closed)
Related to #8415 (closed)
Related to #15955 (closed)
Related to #16015 (closed)
Related to #5502

_Originally created by @intrigeri on [#6876 (Redmine)](https://public-redmine-archive.tails.boum.org/code/issues/6876)_

As part of this work, we should update some hardcoded constants:

- `memory_needed` and `space_needed` in `Tails::IUK::Frontend` (the
    very goal of this work is to decrease these values)
  - `MIN_AVAILABLE_MEMORY` in
    `config/chroot_local-includes/usr/local/bin/tails-upgrade-frontend-wrapper`
    (since tails/tails#17152 was done, likely the Upgrader can work with less free
    memory)

Feature Branch: feature/15281-single-squashfs-diff, iuk:feature/11131-endless-upgrade, iuk:feature/15281-single-squashfs-diff

### Attachments

* [2017Q3.stats](https://redmine.tails.boum.org/code/attachments/download/2140/2017Q3.stats)
  * [2018Q1.stats](https://redmine.tails.boum.org/code/attachments/download/2141/2018Q1.stats)
  * [2017Q4.stats](https://redmine.tails.boum.org/code/attachments/download/2142/2017Q4.stats)
  * [2018Q2.stats](https://redmine.tails.boum.org/code/attachments/download/2143/2018Q2.stats)
  * [2018Q3.stats](https://redmine.tails.boum.org/code/attachments/download/2144/2018Q3.stats)

Parent Task: tails/tails#15283

### Subtasks

- [x] tails/tails#17152

### Related issues

- **Related to** tails/tails#6877
  - **Related to** tails/tails#10115
  - **Related to** tails/tails#9373
  - **Related to** tails/tails#8415
  - **Related to** tails/tails#15955
  - **Related to** tails/tails#16015
  - **Related to** tails/tails#5502

Edited May 21, 2020 by intrigeri

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