How can I reduce "Hidden" RAM in Memory Report?

Question

Hi, I have a problem on RAM in my device. 
 
 I want to reduce "hidden" ram, but I don't know what is that. 
 
 How can I eliminate it? 
 I attached Memory Report and prj.conf 
 
 # 일반 설정
CONFIG_CPP=y
CONFIG_FPU=y
CONFIG_FPU_SHARING=y
CONFIG_NFCT_PINS_AS_GPIOS=y
CONFIG_CPP_MAIN=y
#CONFIG_COMPILER_OPT="-Wdouble-promotion"
CONFIG_FP_HARDABI=y

# RTT 설정
CONFIG_CONSOLE=y
CONFIG_RTT_CONSOLE=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_CBPRINTF_COMPLETE=y
CONFIG_CBPRINTF_FP_SUPPORT=y

# BT 설정
CONFIG_BT=y
CONFIG_BT_DEVICE_NAME_DYNAMIC=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_NUS=y
CONFIG_BT_DEVICE_APPEARANCE=833
CONFIG_BT_OBSERVER=y

# MCUBoot
CONFIG_BOOTLOADER_MCUBOOT=y
CONFIG_PARTITION_MANAGER_ENABLED=y
CONFIG_PM_SINGLE_IMAGE=n

# MCUMmgr
CONFIG_ZCBOR=y
CONFIG_MCUMGR=y

# Partiton Manager
CONFIG_PARTITION_MANAGER_ENABLED=y

# MPU Settings
CONFIG_BT_RX_STACK_SIZE=2048
CONFIG_BT_BUF_ACL_TX_COUNT=20
CONFIG_BT_BUF_ACL_TX_SIZE=251
CONFIG_BT_L2CAP_TX_BUF_COUNT=20
CONFIG_BT_L2CAP_TX_MTU=247

Priyanka · Accepted Answer

Hi, 
 I don't think it's possible to reduce the "Hidden" space. Because certain symbols which are used by various components or outputs of projects might be external to the project's tree structure, or because they might lack enough info needed in order to display them by name, we have the "Hidden", "No Paths" etc. for organizing these symbols. 
 The "Hidden" shows the symbols which were undefined, or whose calling function's name was not identified, etc. So these are actually symbols which are used by the components in your project and unless you remove components from your image/project (which might not be possible as you might need them), you won't be able to reduce this. 
 Regards, 
 Priyanka

How can I reduce "Hidden" RAM in Memory Report?

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