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[opt](memory) max_sys_mem_available_low_water_mark_bytesdefault value modified to 6.4G #37174

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merged 2 commits into from
Jul 5, 2024
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[opt](memory) max_sys_mem_available_low_water_mark_bytesdefault value modified to 6.4G #37174

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xinyiZzz Jul 2, 2024
a3a2323
Merge branch 'master' into zxy/20240702_fix_low_water_mark
xinyiZzz Jul 3, 2024
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7 changes: 1 addition & 6 deletions be/src/common/config.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -116,12 +116,7 @@ DEFINE_mInt32(max_fill_rate, "2");

DEFINE_mInt32(double_resize_threshold, "23");

// The maximum low water mark of the system `/proc/meminfo/MemAvailable`, Unit byte, default 1.6G,
// actual low water mark=min(1.6G, MemTotal * 10%), avoid wasting too much memory on machines
// with large memory larger than 16G.
// Turn up max. On machines with more than 16G memory, more memory buffers will be reserved for Full GC.
// Turn down max. will use as much memory as possible.
DEFINE_Int64(max_sys_mem_available_low_water_mark_bytes, "1717986918");
DEFINE_Int64(max_sys_mem_available_low_water_mark_bytes, "6871947673");

// The size of the memory that gc wants to release each time, as a percentage of the mem limit.
DEFINE_mString(process_minor_gc_size, "10%");
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8 changes: 4 additions & 4 deletions be/src/common/config.h
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Expand Up @@ -158,10 +158,10 @@ DECLARE_mInt32(max_fill_rate);

DECLARE_mInt32(double_resize_threshold);

// The maximum low water mark of the system `/proc/meminfo/MemAvailable`, Unit byte, default 1.6G,
// actual low water mark=min(1.6G, MemTotal * 10%), avoid wasting too much memory on machines
// with large memory larger than 16G.
// Turn up max. On machines with more than 16G memory, more memory buffers will be reserved for Full GC.
// The maximum low water mark of the system `/proc/meminfo/MemAvailable`, Unit byte, default 6.4G,
// actual low water mark=min(6.4G, MemTotal * 10%), avoid wasting too much memory on machines
// with large memory larger than 64G.
// Turn up max. On machines with more than 64G memory, more memory buffers will be reserved for Full GC.
// Turn down max. will use as much memory as possible.
DECLARE_Int64(max_sys_mem_available_low_water_mark_bytes);

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