what are the consequences of not doing a Jira re-index for months

[Darren]

I've encountered a 'mission-critical / business-critical' Jira system used by a global company

and is in use 24/7/365

As such, they haven't re-indexed since their last upgrade (to Data Center 9.4.7) mid-last year (some 7-8 months ago) and I heard that they don't re-index ever since they installed the system some years ago, other than during their annual upgrades.

And no-one's ever complained about anything (that might be caused by a lack of a re-index).  they're constantly changing Custom Field options, and constantly creating Jira Projects;  so it's a very intensely used system;  yet no problems reported that might be caused by a lack of a re-index.

This has got me thinking:  what might some 'hidden problems' be from their lack of re-indexing?

[Max Foerster - K15t · Accepted solution]

Hey @Darren

You might find this article to be a good read! 😄

• Periodic full reindex in Jira Data Center is not required (April 13 2023)

Best, Max

[Darren]

hi @Max Foerster - K15t 

"Since JIRA 8.13, Jira guarantees index consistency so that performing regular full reindex can be skipped."

These guys are on version 9.

So is this saying that a re-index no longer required, at all, despite the Jira Admin UI telling the Jira Admins to reindex (e.g. because a Custom Field was added, or an existing Custom Field's options were changed)?