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Code Issues Releases Wiki Activity

Avoid using too much memory when indexing facet-exists-docids

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This commit is contained in:
Loïc Lecrenier 2022-07-19 14:42:35 +02:00
parent d0eee5ff7a
commit 1506683705
3 changed files with 40 additions and 76 deletions
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19
milli/src/update/index_documents/extract/extract_fid_docid_facet_values.rs
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@ -5,13 +5,15 @@ use std::io;
use std::mem::size_of;
use heed::zerocopy::AsBytes;
use heed::BytesEncode;
use roaring::RoaringBitmap;
use serde_json::Value;
use super::helpers::{create_sorter, keep_first, sorter_into_reader, GrenadParameters};
use crate::error::InternalError;
use crate::facet::value_encoding::f64_into_bytes;
use crate::{DocumentId, FieldId, Result, BEU32};
use crate::update::index_documents::{create_writer, writer_into_reader};
use crate::{CboRoaringBitmapCodec, DocumentId, FieldId, Result, BEU32};
/// Extracts the facet values of each faceted field of each document.
///
@ -22,7 +24,7 @@ pub fn extract_fid_docid_facet_values<R: io::Read + io::Seek>(
obkv_documents: grenad::Reader<R>,
indexer: GrenadParameters,
faceted_fields: &HashSet<FieldId>,
) -> Result<(grenad::Reader<File>, grenad::Reader<File>, BTreeMap<FieldId, RoaringBitmap>)> {
) -> Result<(grenad::Reader<File>, grenad::Reader<File>, grenad::Reader<File>)> {
let max_memory = indexer.max_memory_by_thread();
let mut fid_docid_facet_numbers_sorter = create_sorter(
@ -91,10 +93,21 @@ pub fn extract_fid_docid_facet_values<R: io::Read + io::Seek>(
}
}
let mut facet_exists_docids_writer = create_writer(
indexer.chunk_compression_type,
indexer.chunk_compression_level,
tempfile::tempfile()?,
);
for (fid, bitmap) in facet_exists_docids.into_iter() {
let bitmap_bytes = CboRoaringBitmapCodec::bytes_encode(&bitmap).unwrap();
facet_exists_docids_writer.insert(fid.to_be_bytes(), &bitmap_bytes)?;
}
let facet_exists_docids_reader = writer_into_reader(facet_exists_docids_writer)?;
Ok((
sorter_into_reader(fid_docid_facet_numbers_sorter, indexer.clone())?,
sorter_into_reader(fid_docid_facet_strings_sorter, indexer.clone())?,
facet_exists_docids,
facet_exists_docids_reader,
))
}