1 exec
update tst set val=val+0

Plan
PLAN (TST NATURAL)

Adapted Plan
PLAN (TST NATURAL)

100000 record(s) was(were) updated in TST

------ Performance info ------
Prepare time = 10ms
Execute time = 1s 622ms
Current memory = 1004320
Max memory = 1077888
Memory buffers = 2048
Reads from disk to cache = 1527
Writes from cache to disk = 3
Fetches from cache = 795740


2 exec

Plan
PLAN (TST NATURAL)

Adapted Plan
PLAN (TST NATURAL)

100000 record(s) was(were) updated in TST

------ Performance info ------
Prepare time = 0ms
Execute time = 17s 795ms
Current memory = 1023880
Max memory = 11854540
Memory buffers = 2048
Reads from disk to cache = 1
Writes from cache to disk = 44626
Fetches from cache = 1761418


3 exec

Plan
PLAN (TST NATURAL)

Adapted Plan
PLAN (TST NATURAL)

100000 record(s) was(were) updated in TST

------ Performance info ------
Prepare time = 10ms
Execute time = 2s 664ms
Current memory = 1038472
Max memory = 11869060
Memory buffers = 2048
Reads from disk to cache = 0
Writes from cache to disk = 2
Fetches from cache = 1050944


4 exec

Plan
PLAN (TST NATURAL)

Adapted Plan
PLAN (TST NATURAL)

100000 record(s) was(were) updated in TST

------ Performance info ------
Prepare time = 0ms
Execute time = 2s 674ms
Current memory = 1053052
Max memory = 11883664
Memory buffers = 2048
Reads from disk to cache = 0
Writes from cache to disk = 2
Fetches from cache = 1050944