5120 seems to be reasonable size as ^firstly it is divisible by 1024 ^{otherwise RAM might be used inefficiently} and ^secondly it is slightly more than 1/4 RAM which left the space for other OS operation.However, if the system isn't heavily used for other tasks it's safe to allocate more memory to dbcache. In such cases, increasing it to 1/2 ^{dbcache = 8192} or even 3/4 ^{dbcache = 12288} of RAM might improve performance. User should test what is the best option for him.

5120 seems to be reasonable size as firstly it is divisible by 1024 ^firstly it is divisible by 1024 ^{otherwise RAM might be used inefficiently} and secondly it is slightly more than 1/4 RAM which left the space for other OS operation.. However, if the system isn't heavily used for other tasks it's safe to allocate more memory to dbcache. In such cases, increasing it to 1/2 ^secondly it is slightly more than 1/4 RAM which left the space for other OS operation.However, if the system isn't heavily used for other tasks it's safe to allocate more memory to dbcache. In such cases, increasing it to 1/2 ^{dbcache = 8192} or even 3/4 ^{dbcache = 12288} of RAM canmight improve performance. User should test what is the best option for him.

5120 seems to be a reasonable choice because, firstly, it is divisible by 1024 ^{otherwise RAM might be used  inefficiently} and secondly it is just slightly more than 1/4 RAM assuming 16 GB leaving enough memory for the OS and other background processes.

5120 seems to be reasonable size as firstly it is  divisible by 1024 ^{otherwise RAM might be used  inefficiently} and secondly it is slightly more than 1/4 RAM which left the space for other OS operation. But if the system is not very busy in performing other task dbcache might be increased to 1/2 or even 3/4 RAM,i.e dbcache=8182 or dbcache=12288. However, if the system isn't heavily used for other tasks it's safe to allocate more memory to dbcache. In such cases, increasing it to 1/2 ^{dbcache = 8192} or even 3/4 ^{dbcache = 12288} of  RAM can improve performance.

5120 seems to be a reasonable choice because, firstly, it is divisible by 1024 ^{otherwise RAM might be used  inefficiently} and secondly it is just slightly more than 1/4 RAM assuming 16 GB leaving enough memory for the OS and other background processes.

5120 seems to be reasonable size as firstly it is  divisible by 1024 ^{otherwise RAM might be used  inefficiently} and secondly it is slightly more than 1/4 RAM which left the space for other OS operation. But if the system is not very busy in performing other task dbcache might be increased to 1/2 or even 3/4 RAM,i.e dbcache=8182 or dbcache=12288. However, if the system isn't heavily used for other tasks it's safe to allocate more memory to dbcache. In such cases, increasing it to 1/2 ^{dbcache = 8192} or even 3/4 ^{dbcache = 12288} of  RAM can improve performance.