In T264053, @EBernhardson created a small C program, elasticsearch-madvise to reduce kernel readahead settings, which greatly reduced I/O on our Elastic hosts. We're in the process of migrating to Opensearch, so we need to figure out whether we still need this optimization.
Creating this ticket to:
- Figure out if the program is still needed (does the behavior still occur in Opensearch? Is there an easier way to do this with udev/sysctl or something?)
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We still need it! Repackage for Opensearch!Happening in T387030