[opt](memory) jemalloc conf lg_tcache_max restore default #26362

tc/jemalloc_free_memory in web beip:8040/mem_tracker is the cache size of Jemalloc.

Previously lg_tcache_max:20, this will cache up to 1M Bin in the thread cache, which will cause the Jemalloc cache to be too large in some scenarios.

Restore the default lg_tcache_max:16, which can cache a maximum of 64K Bins.

If you are doing a performance POC, you can consider increasing it.

conf/be.conf

@@ -29,7 +29,7 @@ JAVA_OPTS_FOR_JDK_9="-Xmx1024m -DlogPath=$DORIS_HOME/log/jni.log -Xlog:gc:$DORIS
 
 # https://github.com/apache/doris/blob/master/docs/zh-CN/community/developer-guide/debug-tool.md#jemalloc-heap-profile
 # https://jemalloc.net/jemalloc.3.html
-JEMALLOC_CONF="percpu_arena:percpu,background_thread:true,metadata_thp:auto,muzzy_decay_ms:15000,dirty_decay_ms:15000,oversize_threshold:0,lg_tcache_max:20,prof:false,lg_prof_interval:32,lg_prof_sample:19,prof_gdump:false,prof_accum:false,prof_leak:false,prof_final:false"
+JEMALLOC_CONF="percpu_arena:percpu,background_thread:true,metadata_thp:auto,muzzy_decay_ms:15000,dirty_decay_ms:15000,oversize_threshold:0,prof:false,lg_prof_interval:32,lg_prof_sample:19,prof_gdump:false,prof_accum:false,prof_leak:false,prof_final:false"
 JEMALLOC_PROF_PRFIX=""
 
 # INFO, WARNING, ERROR, FATAL