48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/*
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* Copyright (c) 2020 Huawei Technologies Co.,Ltd.
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*
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* openGauss is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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*
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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* ---------------------------------------------------------------------------------------
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*
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* memctl.h
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* Routines related to memory quota for queries.
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*
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* IDENTIFICATION
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* src/include/workload/memctl.h
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*
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* ---------------------------------------------------------------------------------------
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*/
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#ifndef MEMCTL_H_
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#define MEMCTL_H_
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/*
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* during mem decrease procedure, we want to assign decreased mem to large mem,
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* so just through the mem gap, and after decrease, large item should be at least 20%
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* large than the small one
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*/
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#define DECREASED_MIN_CMP_GAP 0.1
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/* Memory usage larger than 4GB is incredible */
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#define MAX_OP_MEM 4 * 1024L * 1024L
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/* min memory allocate for memory intensive operator for sake of huge initial mem allocation */
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#define MIN_OP_MEM 16 * 1024L
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extern void CalculateQueryMemMain(PlannedStmt* stmt, bool use_tenant, bool called_by_wlm);
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extern bool QueryNeedPlanB(PlannedStmt* stmt);
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extern void ReSetNgQueryMem(PlannedStmt* result);
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extern THR_LOCAL Oid lc_replan_nodegroup;
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#endif /* MEMQUOTA_H_ */
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