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Diffstat (limited to 'spec/dos-spec.md')
| -rw-r--r-- | spec/dos-spec.md | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/spec/dos-spec.md b/spec/dos-spec.md index 04470b2..d3cba22 100644 --- a/spec/dos-spec.md +++ b/spec/dos-spec.md @@ -40,13 +40,14 @@ or derived from a fraction of the total amount of system RAM. As of Tor 0.4.7.x, the MaxMemInQueues mechanism tracks the following kinds of allocation: - * Cells queued on circuits. - * Per-connection read or write buffers. - * On-the-fly compression or decompression state. - * Half-open stream records. - * Cached onion service descriptors (hsdir only). - * Cached DNS resolves (relay only). - * GEOIP-based usage activity statistics. + +* Cells queued on circuits. +* Per-connection read or write buffers. +* On-the-fly compression or decompression state. +* Half-open stream records. +* Cached onion service descriptors (hsdir only). +* Cached DNS resolves (relay only). +* GEOIP-based usage activity statistics. Note that directory caches aren't counted, since those are stored on disk and accessed via mmap. @@ -86,12 +87,10 @@ rule, according to the age of their oldest queued data. Upon freeing a circuit, a "DESTROY cell" must be sent in both directions. -### Reporting low memory. +### Reporting low memory We define a "low threshold" equal to 3/4 of MaxMemInQueues. Every time our memory usage is above the low threshold, we record ourselves as being "under memory pressure". (This is not currently reported.) - - |