Is your feature request related to a problem? Please describe.
This issue is a placeholder to track issues related to WAN round-trips required during the SQL server startup protocol. The goal is to get the number of WAN RPCs to zero. This issue will track work items required to reach that goal.

• sqlliveness: partition table so that sessions can be created without WAN RPCs #85736 partition sqlliveness table for more efficient cold-start
• sqlinstance: optimize for MR cold-start  #85737 optimize sql_instances
• settings: utilize LOCALITY GLOBAL for cluster settings #85738 optimize reading of cluster settings
• kvtenantccl: serve Connector methods needed for startup from local region #85740 ensure Connector methods don't leave the local region
• sql/catalog/lease: optimize descriptor leasing protocol for cold start #85741 optimize descriptor leasing protocol
  • Note that this ends up also containing the work to make user metadata and role membership access local
• multitenant: demo startup performance is poor with multiple tenants and simulated latencies #76305 improve the speed of startup migrations
  • The issue above is strangely named, but is related to the speed of startup migrations when creating and first activating a tenant. Note that this isn't directly related to cold start latency, but is related to the first start after tenant creation, which is also important to optimize.

Jira issue: CRDB-18341

Epic: CRDB-18596