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Looks like qemu-img went to calls that fail hard regardless of free memory. I likely also need to make an input buffer cache knob too. 😭","accounts_in_message":[],"_revision_number":2}],"current_revision_number":2,"current_revision":"bd3e1eab278f79b1bd810e6e7979f16363a1bd71","revisions":{"3d66da6ad9728b854013a2161d6890508492f2f7":{"kind":"REWORK","_number":1,"created":"2020-12-03 22:14:50.000000000","uploader":{"_account_id":11655,"name":"Julia Kreger","email":"juliaashleykreger@gmail.com","username":"jkreger","status":"Flying to the moon with a Jetpack!"},"ref":"refs/changes/87/765387/1","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/ironic-lib","ref":"refs/changes/87/765387/1","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/ironic-lib refs/changes/87/765387/1 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/ironic-lib refs/changes/87/765387/1 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/ironic-lib refs/changes/87/765387/1 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/ironic-lib refs/changes/87/765387/1"}}},"commit":{"parents":[{"commit":"e788188f2387dfd40775f83d88eeb9c62b828965","subject":"Set safe version of hacking","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/ironic-lib/commit/e788188f2387dfd40775f83d88eeb9c62b828965"}]}],"author":{"name":"Julia Kreger","email":"juliaashleykreger@gmail.com","date":"2020-12-03 22:11:39.000000000","tz":-480},"committer":{"name":"Julia Kreger","email":"juliaashleykreger@gmail.com","date":"2020-12-03 22:11:39.000000000","tz":-480},"subject":"WIP: Disable output cache","message":"WIP: Disable output cache\n\nQemu-img, my default in convert, creates an output buffer\ncache to assemble the blocks to efficently stream them to\nthe block device.\n\nThis reduces the amount of memory qemu-img tries to grab to start-up\nand reduces the chances of it failing due to the memory limit.\n\nChange-Id: Iaaf1a7e78e3f28443d2b5a80a194776de6ebc5fc\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/ironic-lib/commit/3d66da6ad9728b854013a2161d6890508492f2f7"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/ironic-lib/commit/3d66da6ad9728b854013a2161d6890508492f2f7"}]},"branch":"refs/heads/master"},"bd3e1eab278f79b1bd810e6e7979f16363a1bd71":{"kind":"REWORK","_number":2,"created":"2020-12-04 21:36:56.000000000","uploader":{"_account_id":11655,"name":"Julia Kreger","email":"juliaashleykreger@gmail.com","username":"jkreger","status":"Flying to the moon with a Jetpack!"},"ref":"refs/changes/87/765387/2","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/ironic-lib","ref":"refs/changes/87/765387/2","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/ironic-lib refs/changes/87/765387/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/ironic-lib refs/changes/87/765387/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/ironic-lib refs/changes/87/765387/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/ironic-lib refs/changes/87/765387/2"}}},"commit":{"parents":[{"commit":"e788188f2387dfd40775f83d88eeb9c62b828965","subject":"Set safe version of hacking","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/ironic-lib/commit/e788188f2387dfd40775f83d88eeb9c62b828965"}]}],"author":{"name":"Julia Kreger","email":"juliaashleykreger@gmail.com","date":"2020-12-03 22:11:39.000000000","tz":-480},"committer":{"name":"Julia Kreger","email":"juliaashleykreger@gmail.com","date":"2020-12-04 21:36:52.000000000","tz":-480},"subject":"Disable output cache","message":"Disable output cache\n\nQemu-img, my default in convert, creates an output buffer\ncache to assemble the blocks to efficently stream them to\nthe block device.\n\nThis reduces the amount of memory qemu-img tries to grab to start-up\nand reduces the chances of it failing due to the memory limit.\n\nBasic testing reveals this reduces the qemu-img failure rate by\napproximately 50% when converting a 1.1GB compressed image to\nraw format where the machine was hovering around 970MB of\ncompletely free memory at any given time.\n\nPlease note: While a system may have 10GB of memory available, with 9GB\nbeing used by caches/buffers, less than 1 GB may be avaialble for an\nimmediate free memory allocation. 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