[CASSANDRA-4282] Improve startup time by making row cache population multi threaded

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 1.2.0 beta 1
• Assignee: Jonathan Ellis
• Reporter: Marcus Eriksson

Authors

Jonathan Ellis

Reviewers

Vijay

• Created: 25/May/12 09:06
• Updated: 16/Apr/19 09:32
• Resolved: 27/Aug/12 22:19

Description

Attached patch multi threads the row cache population

my small tests show improvements atleast;

- 4 cores                                                                                                                                                                                              
- 11G stress-generated data
- page cache dropped between runs                                                                                                                                                                            
                                                                                                                                                                                                       
single platter spinning disk:                                                                                                                                                   
single threaded:                                                                                                                                                                                       
 INFO 10:18:21,365 completed loading (245562 ms; 311381 keys) row cache for Keyspace1.Standard1                                                                                                        
 INFO 10:32:43,738 completed loading (255106 ms; 311381 keys) row cache for Keyspace1.Standard1                                                                                                        
multi threaded:                                                                                                                                                                                        
 INFO 10:22:47,567 completed loading (213905 ms; 311381 keys) row cache for Keyspace1.Standard1                                                                                                        
 INFO 10:27:26,873 completed loading (214514 ms; 311381 keys) row cache for Keyspace1.Standard1                                                                                                        
                                                                                                                                                                                                       
ssd;                                                                                                                                                                                                   
single threaded:                                                                                                                                                                                       
 INFO 10:40:49,079 completed loading (103883 ms; 311381 keys) row cache for Keyspace1.Standard1                                                                                                        
 INFO 10:43:45,799 completed loading (106913 ms; 311381 keys) row cache for Keyspace1.Standard1                                                                                                        
multi threaded:                                                                                                                                                                                        
 INFO 10:38:20,798 completed loading (57617 ms; 311381 keys) row cache for Keyspace1.Standard1                                                                                                         
 INFO 10:47:20,339 completed loading (56682 ms; 311381 keys) row cache for Keyspace1.Standard1