Change Details

### Overview We performed a round of restarts following https://gerrit.wikimedia.org/r/c/operations/puppet/+/632319, but we later uncovered an issue that prevented the readahead changes from taking effect. We need to restart again in order to get the readahead shrinking change properly applied. ###AC [] Restart performed on all relevant elasticsearch nodes (relforge, cloudforge, eqiad, codfw) - [] relforge - [] cloudelastic - [] eqiad - [x] codfw [] Verified new readahead values are taking effect ### DEPLOY NOTES We'll deploy the production cirrus clusters (eqiad + codfw) first, and then cloudelastic and relforge later. This is because for `cloudelastic100[5,6]` the readahead-udev rule doesn't work due to different partition. (See https://phabricator.wikimedia.org/T265699 to track progress on that fix)

### Overview We performed a round of restarts following https://gerrit.wikimedia.org/r/c/operations/puppet/+/632319, but we later uncovered an issue that prevented the readahead changes from taking effect. We need to restart again in order to get the readahead shrinking change properly applied. ###AC [] Restart performed on all relevant elasticsearch nodes (relforge, cloudforge, eqiad, codfw) - [] relforge - [] cloudelastic - [x] eqiad - [x] codfw [] Verified new readahead values are taking effect ### DEPLOY NOTES We'll deploy the production cirrus clusters (eqiad + codfw) first, and then cloudelastic and relforge later. This is because for `cloudelastic100[5,6]` the readahead-udev rule doesn't work due to different partition. (See https://phabricator.wikimedia.org/T265699 to track progress on that fix)

### Overview We performed a round of restarts following https://gerrit.wikimedia.org/r/c/operations/puppet/+/632319, but we later uncovered an issue that prevented the readahead changes from taking effect. We need to restart again in order to get the readahead shrinking change properly applied. ###AC [] Restart performed on all relevant elasticsearch nodes (relforge, cloudforge, eqiad, codfw) - [] relforge - [] cloudelastic - [x] eqiad - [x] codfw [] Verified new readahead values are taking effect ### DEPLOY NOTES We'll deploy the production cirrus clusters (eqiad + codfw) first, and then cloudelastic and relforge later. This is because for `cloudelastic100[5,6]` the readahead-udev rule doesn't work due to different partition. (See https://phabricator.wikimedia.org/T265699 to track progress on that fix)