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 = 0ms
Execute time = 3s 815ms
Current memory = 9172992
Max memory = 9176064
Memory buffers = 2051
Reads from disk to cache = 1522
Writes from cache to disk = 1
Fetches from cache = 795971


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 = 8s 712ms
Current memory = 18997248
Max memory = 19001344
Memory buffers = 2051
Reads from disk to cache = 1
Writes from cache to disk = 44625
Fetches from cache = 1337189

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 = 1m 31s 91ms
Current memory = 18997248
Max memory = 19001344
Memory buffers = 2051
Reads from disk to cache = 0
Writes from cache to disk = 0
Fetches from cache = 503975

4 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 = 1m 39s 102ms
Current memory = 18997248
Max memory = 19001344
Memory buffers = 2051
Reads from disk to cache = 0
Writes from cache to disk = 0
Fetches from cache = 503975