1 exec
update tst set val=val+0
where val >90000

Plan
PLAN (TST INDEX (BY_VAL))

Adapted Plan
PLAN (TST INDEX (BY_VAL))

9999 record(s) was(were) updated in TST

------ Performance info ------
Prepare time = 10ms
Execute time = 170ms
Current memory = 770736
Max memory = 844304
Memory buffers = 2048
Reads from disk to cache = 178
Writes from cache to disk = 3
Fetches from cache = 79283


2 exec

Plan
PLAN (TST INDEX (BY_VAL))

Adapted Plan
PLAN (TST INDEX (BY_VAL))

9999 record(s) was(were) updated in TST

------ Performance info ------
Prepare time = 0ms
Execute time = 1s 582ms
Current memory = 772700
Max memory = 1855260
Memory buffers = 2048
Reads from disk to cache = 0
Writes from cache to disk = 4158
Fetches from cache = 172972


3 exec
Plan
PLAN (TST INDEX (BY_VAL))

Adapted Plan
PLAN (TST INDEX (BY_VAL))

9999 record(s) was(were) updated in TST

------ Performance info ------
Prepare time = 0ms
Execute time = 261ms
Current memory = 773968
Max memory = 1856976
Memory buffers = 2048
Reads from disk to cache = 0
Writes from cache to disk = 2
Fetches from cache = 104673


4 exec

Adapted Plan
PLAN (TST INDEX (BY_VAL))

9999 record(s) was(were) updated in TST

------ Performance info ------
Prepare time = 0ms
Execute time = 251ms
Current memory = 775236
Max memory = 1858216
Memory buffers = 2048
Reads from disk to cache = 0
Writes from cache to disk = 2
Fetches from cache = 104673