Should I raise the default dbcache? | Bitcointalksearch.org

smuckrs

newbie

Activity: 1

Merit: 0

Quote from: shorena on April 02, 2016, 04:53:59 PM

Im not sure if 1024 is still the max.

Maximum is now 16384 for 64-bit machines.

Code:

static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024;

https://github.com/bitcoin/bitcoin/commit/b3ed4236beb7f68e1720ceb3da15e0c3682ef629#diff-d102b6032635ce90158c1e6e614f03b50e4449aa46ce23370da5387a658342fdR25

shorena

copper member

Activity: 1498

Merit: 1528

No I dont escrow anymore.

Quote from: cellard on December 17, 2015, 10:03:16 PM

-dbcache= Set database cache size in megabytes (4 to 1024, default: 100)

So I have a 4 GB system, default is 100.. why is it so low? and why is 1024 the max? There are systems with 64GB of ram out there but limit is 1024 to be used by the program?

Anyway, where should I raise this to, considering I have 4GB?

I put it on 4096 to sync, because it significantly reduces sync times (~8.5 hours on 2 cores, mechanical disk). Once Im done I remove the line from the bitcoin.conf though. What it does is reduce how often core needs to write changes to the database to disk. Im not sure if 1024 is still the max. A higher cache provides next to no benefits under normal circumstances AFAIK. Well it takes ages to shut down though, but I dont see that as a benefit.

vinaha

member

Activity: 112

Merit: 10

Can anyone answer this? Because I have the same question.

cellard

legendary

Activity: 1372

Merit: 1252

-dbcache= Set database cache size in megabytes (4 to 1024, default: 100)

So I have a 4 GB system, default is 100.. why is it so low? and why is 1024 the max? There are systems with 64GB of ram out there but limit is 1024 to be used by the program?

Anyway, where should I raise this to, considering I have 4GB?

Topic: Should I raise the default dbcache? (Read 2280 times)