OSPF LSA flooding pacing

The CCO link explains

ASBR1(config-router)#timers pacing ?
flood OSPF flood pacing timer
lsa-group OSPF LSA group pacing timer
retransmission OSPF retransmission pacing timer

Feature Overview

In rare situations, you might need to change Open Shortest Path First (OSPF) packet-pacing default timers to mitigate CPU or buffer utilization issues associated with flooding very large numbers of link-state advertisements (LSAs). The OSPF Update Packet-Pacing Configurable Timers feature allows you to configure the rate at which OSPF LSA flood pacing, retransmission pacing, and group pacing updates occur.

Configuring OSPF flood pacing timers allows you to control interpacket spacing between consecutive link-state update packets in the OSPF transmission queue. Configuring OSPF retransmission pacing timers allows you to control interpacket spacing between consecutive link-state update packets in the OSPF retransmission queue. Cisco IOS software groups the periodic refresh of LSAs to improve the LSA packing density for the refreshes in large topologies. The group timer controls the interval used for group LSA refreshment; however, this timer does not change the frequency that individual LSAs are refreshed (the default refresh occurs every 30 minutes).

The default are

LSA group pacing timer 240 secs ==> timers pacing lsa-group
Interface flood pacing timer 33 msecs ==> timers pacing flood
Retransmission pacing timer 66 msecs ==> timers pacing retransmission