[vpsAdminOS] tune ARC and dirty data defaults

vpsfreecz · Oct 5, 2022 · ce28cd1 · ce28cd1
1 parent fb296cd
commit ce28cd1
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Showing 3 changed files with 5 additions and 5 deletions.
diff --git a/module/os/linux/zfs/arc_os.c b/module/os/linux/zfs/arc_os.c
@@ -84,8 +84,8 @@ static struct notifier_block arc_hotplug_callback_mem_nb;
 uint64_t
 arc_default_max(uint64_t min, uint64_t allmem)
 {
-	/* Default to 1/2 of all memory. */
-	return (MAX(allmem / 2, min));
+	/* Default to 1/4 of all memory */
+	return MAX(allmem / 4, min);
 }
 
 #ifdef _KERNEL
@@ -421,7 +421,7 @@ arc_hotplug_callback(struct notifier_block *self, unsigned long action,
 
 #ifdef __LP64__
 	if (zfs_dirty_data_max_max == 0)
-		zfs_dirty_data_max_max = MIN(4ULL * 1024 * 1024 * 1024,
+		zfs_dirty_data_max_max = MIN(128ULL * 1024 * 1024 * 1024,
 		    allmem * zfs_dirty_data_max_max_percent / 100);
 #else
 	if (zfs_dirty_data_max_max == 0)

diff --git a/module/zfs/arc.c b/module/zfs/arc.c
@@ -8002,7 +8002,7 @@ arc_init(void)
 	 */
 #ifdef __LP64__
 	if (zfs_dirty_data_max_max == 0)
-		zfs_dirty_data_max_max = MIN(4ULL * 1024 * 1024 * 1024,
+		zfs_dirty_data_max_max = MIN(128ULL * 1024 * 1024 * 1024,
 		    allmem * zfs_dirty_data_max_max_percent / 100);
 #else
 	if (zfs_dirty_data_max_max == 0)

diff --git a/module/zfs/dsl_pool.c b/module/zfs/dsl_pool.c
@@ -117,7 +117,7 @@ unsigned long zfs_wrlog_data_max = 0;
  * zfs_dirty_data_max), push out a txg.  This should be less than
  * zfs_vdev_async_write_active_min_dirty_percent.
  */
-int zfs_dirty_data_sync_percent = 20;
+int zfs_dirty_data_sync_percent = 23;
 
 /*
  * Once there is this amount of dirty data, the dmu_tx_delay() will kick in