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Attempt to raise the file descriptor limit at startup (#2527)

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Neil Alexander 2022-06-10 10:58:04 +01:00 committed by GitHub
parent 1030072285
commit 89d2adadbd
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1 changed files with 15 additions and 2 deletions
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17
setup/base/sanity_unix.go
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@ -15,8 +15,21 @@ func platformSanityChecks() {
// If we run out of file descriptors, we might run into problems accessing // If we run out of file descriptors, we might run into problems accessing
// PostgreSQL amongst other things. Complain at startup if we think the // PostgreSQL amongst other things. Complain at startup if we think the
// number of file descriptors is too low. // number of file descriptors is too low.
var rLimit syscall.Rlimit warn := func(rLimit *syscall.Rlimit) {
if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit); err == nil && rLimit.Cur < 65535 {
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) 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)
}
}
} }