feat(execute): allocate memory for string content. #5482
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Update the string column builder to account for the memory for the string contents.
mhilton
commented
May 20, 2024
| @@ -1180,7 +1202,9 @@ func (b *ColListTableBuilder) GetRow(row int) values.Object { | |||
| case flux.TFloat: | |||
| val = values.NewFloat(b.cols[j].(*floatColumnBuilder).data[row]) | |||
| case flux.TString: | |||
| val = values.NewString(b.cols[j].(*stringColumnBuilder).data[row]) | |||
| // TODO(mhilton): avoid a copy | |||
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It is intended this will be changed in a followup PR.
jeffreyssmith2nd
approved these changes
May 20, 2024
appletreeisyellow
approved these changes
May 20, 2024
Comment on lines
+223
to
+231
| // String represents a string stored in some backing byte slice. | ||
| type String struct { | ||
| offset int | ||
| len int | ||
| } | ||
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|
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| func (s String) Bytes(buf *arrowmem.Buffer) []byte { | ||
| return buf.Bytes()[s.offset : s.offset+s.len] | ||
| } |
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👍 My understanding of this new struct is that it stores the column string size and if a string get too long, we can do something with it
mhilton
added a commit
that referenced
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Aug 13, 2024
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Update the string column builder to account for the memory for the string contents. This is part of an effort to reduce the prevelence of OOMs caused by unaccounted memory data See influxdata/idpe#18697.
Checklist
Dear Author 👋, the following checks should be completed (or explicitly dismissed) before merging.
experimental/docs/Spec.mdhas been updatedDear Reviewer(s) 👋, you are responsible (among others) for ensuring the completeness and quality of the above before approval.