[doris] 02/10: [fix](tcmalloc) use low_watermark instead of hard_mem_limit (#14660)

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morningman pushed a commit to branch branch-1.2-unstable
in repository https://gitbox.apache.org/repos/asf/doris.git

commit 4924ef3f598ceab5405ebb10c378e97e3c31069c
Author: Yongqiang YANG <98...@users.noreply.github.com>
AuthorDate: Wed Nov 30 11:29:57 2022 +0800

    [fix](tcmalloc) use low_watermark instead of hard_mem_limit (#14660)
    
    * [fix](tcmalloc) use low_watermark instead of hard_mem_limit
    
    hard_mem_limit is removed.
    
    * format
---
 be/src/common/daemon.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/be/src/common/daemon.cpp b/be/src/common/daemon.cpp
index d8e6ff0a69..497edd3037 100644
--- a/be/src/common/daemon.cpp
+++ b/be/src/common/daemon.cpp
@@ -80,7 +80,9 @@ void Daemon::tcmalloc_gc_thread() {
     double release_rates[10] = {1.0, 1.0, 1.0, 5.0, 5.0, 20.0, 50.0, 100.0, 500.0, 2000.0};
     int64_t pressure_limit = 90;
     bool is_performance_mode = false;
-    size_t physical_limit_bytes = std::min(MemInfo::hard_mem_limit(), MemInfo::mem_limit());
+    size_t physical_limit_bytes =
+            std::min(MemInfo::physical_mem() - MemInfo::sys_mem_available_low_water_mark(),
+                     MemInfo::mem_limit());
 
     if (config::memory_mode == std::string("performance")) {
         max_cache_percent = 100;


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