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fix (xtuner): fix the bug that shared_buffers has no round

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This commit is contained in:
wangtq
2021-03-30 17:07:35 +08:00
parent cc1cc58c28
commit 1afa003280
1 changed files with 8 additions and 6 deletions
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14
src/gausskernel/dbmind/tools/xtuner/tuner/recommend.py
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@ -28,6 +28,8 @@ SIZE_UNIT_MAP = {"kB": 1,
"MB": 1024,
"GB": 1024 * 1024}
def round4(v):
return v + (4 - v % 4)
def recommend_knobs(mode, metric):
advisor = OpenGaussKnobAdvisor(metric)
@ -250,16 +252,16 @@ class OpenGaussKnobAdvisor:
default = 0.25 * mem_total
# The value of this knob means the number of maximum cached blocks.
recommend = default / self.metric.block_size
recommend = round4(default / self.metric.block_size)
if self.metric.is_64bit:
database_blocks = self.metric.all_database_size / self.metric.block_size
if database_blocks < recommend:
self.report.print_warn("The total size of all databases is less than the memory size. "
"Therefore, it is unnecessary to set shared_buffers to a large value.")
recommend = min(database_blocks, recommend)
upper = recommend * 1.15
lower = min(0.15 * mem_total / self.metric.block_size, recommend)
recommend = round4(min(database_blocks, recommend))
upper = round4(recommend * 1.15)
lower = round4(min(0.15 * mem_total / self.metric.block_size, recommend))
return Knob.new_instance(name="shared_buffers",
value_default=recommend,
@ -268,8 +270,8 @@ class OpenGaussKnobAdvisor:
value_min=lower,
restart=True)
else:
upper = min(recommend, 2 * SIZE_UNIT_MAP["GB"] / self.metric.block_size) # 32-bit OS only can use 2 GB mem.
lower = min(0.15 * mem_total / self.metric.block_size, recommend)
upper = round4(min(recommend, 2 * SIZE_UNIT_MAP["GB"] / self.metric.block_size)) # 32-bit OS only can use 2 GB mem.
lower = round4(min(0.15 * mem_total / self.metric.block_size, recommend))
return Knob.new_instance(name="shared_buffers",
value_default=recommend,
knob_type=Knob.TYPE.INT,