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[Fix](load) Lower lock granularity to reduce loading CPU pressure #40134

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merged 1 commit into from
Aug 29, 2024
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[Fix](load) Lower lock granularity to reduce loading CPU pressure #40134

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13 changes: 8 additions & 5 deletions be/src/runtime/tablets_channel.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -582,12 +582,15 @@ Status BaseTabletsChannel::_write_block_data(

// add_batch may concurrency with inc_open but not under _lock.
// so need to protect it with _tablet_writers_lock.
std::lock_guard<SpinLock> l(_tablet_writers_lock);

auto tablet_writer_it = _tablet_writers.find(tablet_id);
if (tablet_writer_it == _tablet_writers.end()) {
return Status::InternalError("unknown tablet to append data, tablet={}", tablet_id);
decltype(_tablet_writers.find(tablet_id)) tablet_writer_it;
{
std::lock_guard<SpinLock> l(_tablet_writers_lock);
tablet_writer_it = _tablet_writers.find(tablet_id);
if (tablet_writer_it == _tablet_writers.end()) {
return Status::InternalError("unknown tablet to append data, tablet={}", tablet_id);
}
}

Status st = write_func(tablet_writer_it->second.get());
if (!st.ok()) {
auto err_msg =
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