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MCOL-4810 Redundant copying and wasting memory in PrimProc

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This patch eliminates a copying `long string`s into the bytestream.
This commit is contained in:
Denis Khalikov
2021-08-11 15:07:19 +03:00
parent ea622eec93
commit 4a0150e93d
6 changed files with 155 additions and 176 deletions
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16
utils/rowgroup/rowgroup.h
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@@ -175,13 +175,6 @@ public:
return fUseStoreStringMutex;
}
private:
std::string empty_str;
StringStore(const StringStore&);
StringStore& operator=(const StringStore&);
static const uint32_t CHUNK_SIZE = 64 * 1024; // allocators like powers of 2
// This is an overlay b/c the underlying data needs to be any size,
// and alloc'd in one chunk. data can't be a separate dynamic chunk.
struct MemChunk
@@ -191,7 +184,14 @@ private:
uint8_t data[];
};
std::vector<boost::shared_array<uint8_t> > mem;
private:
std::string empty_str;
StringStore(const StringStore&);
StringStore& operator=(const StringStore&);
static constexpr const uint32_t CHUNK_SIZE = 64 * 1024; // allocators like powers of 2
std::vector<boost::shared_array<uint8_t>> mem;
// To store strings > 64KB (BLOB/TEXT)
std::vector<boost::shared_array<uint8_t> > longStrings;