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//go:build unix
// +build unix
package base
import (
"syscall"
"github.com/sirupsen/logrus"
)
func PlatformSanityChecks() {
// Dendrite needs a relatively high number of file descriptors in order
// to function properly, particularly when federating with lots of servers.
// If we run out of file descriptors, we might run into problems accessing
// PostgreSQL amongst other things. Complain at startup if we think the
// number of file descriptors is too low.
warn := func(rLimit *syscall.Rlimit) {
logrus.Warnf("IMPORTANT: Process file descriptor limit is currently %d, it is recommended to raise the limit for Dendrite to at least 65535 to avoid issues", rLimit.Cur)
}
var rLimit syscall.Rlimit
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err == nil && rLimit.Cur < 65535 {
// The file descriptor count is too low. Let's try to raise it.
rLimit.Cur = 65535
if err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit); err != nil {
// We failed to raise it, so log an error.
logrus.WithError(err).Warn("IMPORTANT: Failed to raise the file descriptor limit")
warn(&rLimit)
} else if err = syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err == nil && rLimit.Cur < 65535 {
// We think we successfully raised the limit, but a second call to
// get the limit told us that we didn't succeed. Log an error.
warn(&rLimit)
}
}
}
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