Change the logic for the default for MaxMemInQueues

If we can't detect the physical memory, the new default is 8 GB on
64-bit architectures, and 1 GB on 32-bit architectures.

If we *can* detect the physical memory, the new default is
  CLAMP(256 MB, phys_mem * 0.75, MAX_DFLT)
where MAX_DFLT is 8 GB on 64-bit architectures and 2 GB on 32-bit
architectures.

You can still override the default by hand.  The logic here is simply
trying to choose a lower default value on systems with less than 12 GB
of physical RAM.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/or/or.h b/src/or/or.h
index 38ab1767e0..fa5a3232a0 100644
--- a/src/or/or.h
+++ b/src/or/or.h
@@ -3474,7 +3474,10 @@ typedef struct {
   config_line_t *DirPort_lines;
   config_line_t *DNSPort_lines; /**< Ports to listen on for DNS requests. */
 
-  uint64_t MaxMemInQueues; /**< If we have more memory than this allocated
+  /* MaxMemInQueues value as input by the user. We clean this up to be
+   * MaxMemInQueues. */
+  uint64_t MaxMemInQueues_raw;
+  uint64_t MaxMemInQueues;/**< If we have more memory than this allocated
                             * for queues and buffers, run the OOM handler */
 
   /** @name port booleans