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 = 0ms
Execute time = 391ms
Current memory = 8984472
Max memory = 9075704
Memory buffers = 2038
Reads from disk to cache = 177
Writes from cache to disk = 1
Fetches from cache = 79533


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 = 7s 521ms
Current memory = 9964544
Max memory = 9968640
Memory buffers = 2038
Reads from disk to cache = 0
Writes from cache to disk = 4214
Fetches from cache = 185645


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 = 10ms
Execute time = 8s 432ms
Current memory = 10078208
Max memory = 10082304
Memory buffers = 2065
Reads from disk to cache = 0
Writes from cache to disk = 0
Fetches from cache = 139966


4 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 = 8s 462ms
Current memory = 10078208
Max memory = 10082304
Memory buffers = 2065
Reads from disk to cache = 0
Writes from cache to disk = 0
Fetches from cache = 139966