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Allow file descriptor limit to be set via CLI #24477

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merged 4 commits into from
Mar 7, 2022
Merged

Allow file descriptor limit to be set via CLI #24477

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c6320c9
eth, cmd: allow FdLimit to be set in config/command line (#24148)
ohe Feb 27, 2022
9fa8e01
eth/ethconfig: format code
rjl493456442 Mar 1, 2022
acac749
cmd, eth/ethconfig: simplify fdlimit arg, disallow toml
karalabe Mar 7, 2022
f96219e
cnd/utils: make fdlimit setting nicer on the logs
karalabe Mar 7, 2022
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1 change: 1 addition & 0 deletions cmd/geth/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -118,6 +118,7 @@ var (
utils.CacheSnapshotFlag,
utils.CacheNoPrefetchFlag,
utils.CachePreimagesFlag,
utils.FDLimitFlag,
utils.ListenPortFlag,
utils.MaxPeersFlag,
utils.MaxPendingPeersFlag,
Expand Down
1 change: 1 addition & 0 deletions cmd/geth/usage.go
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Expand Up @@ -119,6 +119,7 @@ var AppHelpFlagGroups = []flags.FlagGroup{
utils.CacheSnapshotFlag,
utils.CacheNoPrefetchFlag,
utils.CachePreimagesFlag,
utils.FDLimitFlag,
},
},
{
Expand Down
23 changes: 20 additions & 3 deletions cmd/utils/flags.go
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Original file line number Diff line number Diff line change
Expand Up @@ -433,6 +433,10 @@ var (
Name: "cache.preimages",
Usage: "Enable recording the SHA3/keccak preimages of trie keys",
}
FDLimitFlag = cli.IntFlag{
Name: "fdlimit",
Usage: "Raise the open file descriptor resource limit (default = system fd limit)",
}
// Miner settings
MiningEnabledFlag = cli.BoolFlag{
Name: "mine",
Expand Down Expand Up @@ -1057,11 +1061,24 @@ func setLes(ctx *cli.Context, cfg *ethconfig.Config) {

// MakeDatabaseHandles raises out the number of allowed file handles per process
// for Geth and returns half of the allowance to assign to the database.
func MakeDatabaseHandles() int {
func MakeDatabaseHandles(max int) int {
limit, err := fdlimit.Maximum()
if err != nil {
Fatalf("Failed to retrieve file descriptor allowance: %v", err)
}
switch {
case max == 0:
// User didn't specify a meaningful value, use system limits
case max < 128:
// User specified something unhealthy, just use system defaults
log.Error("File descriptor limit invalid (<128)", "had", max, "updated", limit)
case max > limit:
// User requested more than the OS allows, notify that we can't allocate it
log.Warn("Requested file descriptors denied by OS", "req", max, "limit", limit)
default:
// User limit is meaningful and within allowed range, use that
limit = max
}
raised, err := fdlimit.Raise(uint64(limit))
if err != nil {
Fatalf("Failed to raise file descriptor allowance: %v", err)
Expand Down Expand Up @@ -1522,7 +1539,7 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *ethconfig.Config) {
if ctx.GlobalIsSet(CacheFlag.Name) || ctx.GlobalIsSet(CacheDatabaseFlag.Name) {
cfg.DatabaseCache = ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheDatabaseFlag.Name) / 100
}
cfg.DatabaseHandles = MakeDatabaseHandles()
cfg.DatabaseHandles = MakeDatabaseHandles(ctx.GlobalInt(FDLimitFlag.Name))
if ctx.GlobalIsSet(AncientFlag.Name) {
cfg.DatabaseFreezer = ctx.GlobalString(AncientFlag.Name)
}
Expand Down Expand Up @@ -1840,7 +1857,7 @@ func SplitTagsFlag(tagsFlag string) map[string]string {
func MakeChainDatabase(ctx *cli.Context, stack *node.Node, readonly bool) ethdb.Database {
var (
cache = ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheDatabaseFlag.Name) / 100
handles = MakeDatabaseHandles()
handles = MakeDatabaseHandles(ctx.GlobalInt(FDLimitFlag.Name))

err error
chainDb ethdb.Database
Expand Down