# Feature: Accounts Index on Disk (1.14.17)

**URL:** <https://forum.solana.com/t/feature-accounts-index-on-disk-1-14-17/190>\
**Category:** Releases\
**Tags:** 114, feature\
**Created:** [May 4, 2023, 11:39pm UTC](https://forum.solana.com/t/feature-accounts-index-on-disk-1-14-17/190 "2023-05-04T23:39:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ZenLlama](https://avatars.discourse-cdn.com/v4/letter/z/9fc348/32.png) [@ZenLlama](https://forum.solana.com/u/ZenLlama)\
**Post date:** [May 4, 2023, 11:39pm UTC](https://forum.solana.com/t/feature-accounts-index-on-disk-1-14-17/190/1 "2023-05-04T23:39:55Z")

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Version 1.14.17 of the Solana Labs validator client introduces a command line interface (CLI) option `--enable-accounts-disk-index` that enables storage of the `AccountsIndex` on disk rather than in RAM. This option can be enabled on validator start-up and reduces the RAM usage of a mainnet-beta validator by about 40-50GB as of May 4th 2023. It reduces RAM usage by storing the Accounts Index on disk, and using an in-memory least recently used (LRU) cache to store the most actively accessed accounts.

This feature is not enabled by default. It is recommended only for validators with their `Ledger` folder backed by 2 performant NVMe SSDs. Validators with only one SSD or older style SSDs may encounter performance degradation evident by disk IO reads/writes increasing significantly. This is particularly evident during startup/catchup such that the validators do not catch up quickly.