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Reduce db write cache to (2*) 4 MiB

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I haven't been able to reproduce any performance advantage of having it
set higher and it reduces the memory footprint a bit.
This commit is contained in:
Jakob Borg 2015-05-23 21:05:52 +02:00
parent e215cf6fb8
commit 8ed67fe349
1 changed files with 2 additions and 4 deletions
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6
cmd/syncthing/main.go
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@ -714,9 +714,7 @@ func syncthingMain() {
func dbOpts() *opt.Options { func dbOpts() *opt.Options {
// Calculate a suitable database block cache capacity. // Calculate a suitable database block cache capacity.
// Default is 8 MiB. In reality, the database will use twice the amount we // Default is 8 MiB.
// calculate here, as it also has two write buffers each sized at half the
// block cache.
blockCacheCapacity := 8 << 20 blockCacheCapacity := 8 << 20
// Increase block cache up to this maximum: // Increase block cache up to this maximum:
const maxCapacity = 64 << 20 const maxCapacity = 64 << 20
@ -743,7 +741,7 @@ func dbOpts() *opt.Options {
return &opt.Options{ return &opt.Options{
OpenFilesCacheCapacity: 100, OpenFilesCacheCapacity: 100,
BlockCacheCapacity: blockCacheCapacity, BlockCacheCapacity: blockCacheCapacity,
WriteBuffer: blockCacheCapacity / 2, WriteBuffer: 4 << 20,
} }
} }