Commit Graph

6 Commits (1b87e025e92ac25ec9083c6fb8c2b226a8c2dd98)

Author SHA1 Message Date
Maisem Ali 05e55f4a0b logtail/filch: limit buffer file size to 50MB
Signed-off-by: Maisem Ali <maisem@tailscale.com>
3 years ago
Josh Bleecher Snyder 93284209bc logtail/filch: preallocate a scanner buffer
Scanning log lines is a frequent source of allocations.
Pre-allocate a re-usable buffer.

This still doesn't help when there are giant log lines.
Those will still be problematic from an iOS memory perspective.
For more on that, see https://github.com/tailscale/corp/issues/2423.

(For those who cannot follow that link, it is a discussion
of particular problematic types of log lines for
particular categories of customers. The "categories of customers"
part is the reason that it is a private issue.)

There is also a latent bug here. If we ever encounter
a log line longer than bufio.MaxScanTokenSize,
then bufio.Scan will return an error,
and we'll truncate the file and discard the rest of the log.
That's not good, but bufio.MaxScanTokenSize is really big,
so it probably doesn't matter much in practice now.
Unfortunately, it does prevent us from easily capping the potential
memory usage here, on pain of losing log entries.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
3 years ago
Brad Fitzpatrick 7a2a3955d3 logtail/filch: skip a broken test on Windows
Add a TODO with some notes about why it's skipped for now.

Updates #50
4 years ago
Josh Bleecher Snyder 585a0d8997 all: use testing.T.TempDir
Bit of Friday cleanup.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
4 years ago
Avery Pennarun 5eb09c8f5e filch_test: clarify the use of os.RemoveAll().
Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
5 years ago
Earl Lee a8d8b8719a Move Linux client & common packages into a public repo. 5 years ago