diff options
Diffstat (limited to 'Documentation/public-inbox-tuning.pod')
| -rw-r--r-- | Documentation/public-inbox-tuning.pod | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/public-inbox-tuning.pod b/Documentation/public-inbox-tuning.pod index b4e7698b..f5a25676 100644 --- a/Documentation/public-inbox-tuning.pod +++ b/Documentation/public-inbox-tuning.pod @@ -74,7 +74,7 @@ sharding imposes a performance penalty for read-only queries. Users with large amounts of RAM are advised to set a large value for C<publicinbox.indexBatchSize> as documented in -L<public-inbox-config(5)>. +L<public-inbox-index(1)>. C<dm-crypt> users on Linux 4.0+ are advised to try the C<--perf-same_cpu_crypt> C<--perf-submit_from_crypt_cpus> @@ -95,7 +95,9 @@ Disabling copy-on-write also disables checksumming, thus C<raid1> Fortunately, these SQLite and Xapian indices are designed to recoverable from git if missing. -Disabling CoW does not prevent all fragmentation. +Disabling CoW does not prevent all fragmentation. Large values +of C<publicInbox.indexBatchSize> also limit fragmentation during +the initial index. Avoid snapshotting subvolumes containing Xapian and/or SQLite indices. Snapshots use CoW despite our efforts to disable it, resulting |