[OAK-6704] Set default merge polity to tiered as CommitMitigatingTieredMergePolicy seems to be bad for performance

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.7
• Fix Version/s: 1.7.8, 1.8.0
• Component/s: lucene
• Epic Link: indexer resilience
• Sprint: L11
• Assignee: Vikas Saurabh
• Reporter: Vikas Saurabh
• Created: 22/Sep/17 10:52
• Updated: 29/Sep/17 10:09
• Resolved: 23/Sep/17 09:12

Description

While testing some AEM setups which were using the new default merge policy CommitMitigatingTieredMergePolicy, it seems that this policy has some adverse performance impact.

We should revert the default to TieredMergePolicy while we investigate further.

/cc teofili

Issue Links

• is broken by: OAK-5192 Reduce Lucene related growth of repository size
• is related to: OAK-6710 CommitMitigated merge policy should not reduce performance significantly