[KUDU-2064] Overall log cache usage doesn't respect the limit

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.4.0
• Component/s: log
• Labels: data-scalability
• Assignee: Unassigned
• Reporter: Jean-Daniel Cryans
• Created: 10/Jul/17 18:49
• Updated: 26/May/21 11:11

Description

Looking at a fairly loaded machine (10TB of data in LBM, close to 10k tablets), I can see in the mem-trackers page that the log cache is using 1.83GB, that it peaked at 2.82GB, with a 1GB limit. It's consistent on other similarly loaded tservers. It's unexpected.

Looking at the per-tablet breakdown, they all have between 0 and a handful of MBs.