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optimize adaptive batch size for co merge

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This commit is contained in:
obdev
2024-02-10 00:46:12 +00:00
committed by ob-robot
parent 0247a71c69
commit d14ea1e8a6
2 changed files with 12 additions and 11 deletions
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21
src/storage/column_store/ob_co_merge_dag.cpp
View File

@ -1140,7 +1140,7 @@ int ObCOMergeDagNet::create_co_execute_dags(share::ObIDag &schedule_dag)
ret = OB_ERR_UNEXPECTED;
LOG_WARN("merge ctx is null or schema invalid", K(ret), KPC(co_merge_ctx_));
SET_DAG_LOCATION(&schedule_dag);
} else if (OB_FAIL(choose_merge_batch_size(*co_merge_ctx_))) {
} else if (OB_FAIL(choose_merge_batch_size(co_merge_ctx_->array_count_))) {
LOG_WARN("failed to choose merge batch size", K(ret));
} else if (OB_FAIL(inner_create_and_schedule_dags(&schedule_dag))) {
LOG_WARN("failed to create and schedule dags", K(ret));
@ -1149,14 +1149,13 @@ int ObCOMergeDagNet::create_co_execute_dags(share::ObIDag &schedule_dag)
return ret;
}
int ObCOMergeDagNet::choose_merge_batch_size(ObCOTabletMergeCtx &co_ctx)
int ObCOMergeDagNet::choose_merge_batch_size(const int64_t column_group_cnt)
{
int ret = OB_SUCCESS;
const int64_t column_group_cnt = co_ctx.array_count_;
if (OB_UNLIKELY(column_group_cnt <= 0)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected count", K(ret), K(column_group_cnt), K(co_ctx));
LOG_WARN("get unexpected count", K(ret), K(column_group_cnt));
} else if (column_group_cnt < ObCOTabletMergeCtx::DEFAULT_CG_MERGE_BATCH_SIZE * 2) {
merge_batch_size_ = column_group_cnt;
} else {
@ -1211,13 +1210,15 @@ void ObCOMergeDagNet::try_update_merge_batch_size(const int64_t column_group_cnt
int64_t batch_mem_allow_per_thread = MAX(mem_allow_used / merge_thread - ObCompactionEstimator::MAJOR_MEM_PER_THREAD, 0);
int64_t mem_allow_batch_size = MAX(batch_mem_allow_per_thread / ObCompactionEstimator::CO_MAJOR_CG_BASE_MEM, 1);
if (mem_allow_batch_size >= column_group_cnt) {
merge_batch_size_ = column_group_cnt;
} else if (mem_allow_batch_size > merge_batch_size_) {
merge_batch_size_ = mem_allow_batch_size;
} else {
//TODO(@DanLing) use default batch size now, we need more experiment about mem stat to dec batch size
if (mem_allow_batch_size > merge_batch_size_ * 2) {
merge_batch_size_ = MIN(merge_batch_size_ * 2, column_group_cnt);
} else if (OB_TMP_FAIL(choose_merge_batch_size(column_group_cnt))) {
merge_batch_size_ = ObCOTabletMergeCtx::DEFAULT_CG_MERGE_BATCH_SIZE;
LOG_WARN_RET(tmp_ret, "failed to choose merge batch size, use default batch size", K(column_group_cnt), K(merge_batch_size_));
}
FLOG_INFO("[ADAPTIVE_SCHED] update co merge batch size", K(merge_thread),
K(mem_allow_used), K(batch_mem_allow_per_thread), K(mem_allow_batch_size), K(merge_batch_size_));
}
int ObCOMergeDagNet::inner_create_and_schedule_dags(ObIDag *parent_dag)

2
src/storage/column_store/ob_co_merge_dag.h
View File

@ -318,7 +318,7 @@ private:
const int64_t max_cg_idx,
ObCOMergeBatchExeDag *&dag,
const bool add_scheduler_flag = true);
int choose_merge_batch_size(ObCOTabletMergeCtx &co_ctx);
int choose_merge_batch_size(const int64_t column_group_cnt);
int inner_schedule_finish_dag(ObIDag *parent_dag = nullptr);
void try_update_merge_batch_size(const int64_t column_group_cnt);
int inner_create_and_schedule_dags(ObIDag *parent_dag = nullptr);