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Diffstat (limited to 'Documentation/public-inbox-tuning.pod')
| -rw-r--r-- | Documentation/public-inbox-tuning.pod | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/public-inbox-tuning.pod b/Documentation/public-inbox-tuning.pod index 38810ce6..73246144 100644 --- a/Documentation/public-inbox-tuning.pod +++ b/Documentation/public-inbox-tuning.pod @@ -163,6 +163,11 @@ Transport Layer Security (IMAPS, NNTPS, or via STARTTLS) significantly increases memory use of client sockets, be sure to account for that in capacity planning. +Bursts of small object allocations late in process life contribute to +fragmentation of the heap due to arenas (slabs) used internally by Perl. +jemalloc (tested as an LD_PRELOAD on GNU/Linux) appears to reduce +overall fragmentation compared to glibc malloc in long-lived processes. + =head2 Other OS tuning knobs Linux users: the C<sys.vm.max_map_count> sysctl may need to be increased if |