X-Git-Url: https://git.cworth.org/git?p=notmuch-wiki;a=blobdiff_plain;f=performance.mdwn;h=250b07d78d8c39686d2146d762a797839251f110;hp=04a36d8e0d78e168d6e1a83b9c811bdafa9b345c;hb=618ce49f078599b4616afaaedf98df6fdf7f9b80;hpb=340850acdb04353360caaa94bed90c7cf2a194d5

diff --git a/performance.mdwn b/performance.mdwn
index 04a36d8..250b07d 100644
--- a/performance.mdwn
+++ b/performance.mdwn
@@ -1,5 +1,20 @@
+[[!img notmuch-logo.png alt="Notmuch logo" class="left"]]
 # Optimize notmuch's performance
 
+[[!toc levels=2]]
+
+## Use of ecryptfs slows notmuch down.
+
+I noticed that my `notmuch new` was really slow (several minutes) for
+less then 20 new emails (around 20K in my database).
+
+The performance tests in the notmuch source didn't show any real
+issue, even on a non-encrypted ext4 fs.
+
+After investigation and running different tests, a switch to a
+LUKS-btrfs based filesystem to replace the ext4-ecryptfs resolved the
+issue. It now takes some seconds to index hundreds of messages.
+
 ## Xapian 1.2.x database format: chert vs. flint
 
 Xapian 1.2 (in contrast to 1.0.x) uses a new database format called
@@ -25,7 +40,7 @@ XXX: add examples for different distributions
 Backup your notmuch tags:
 
     $ cd
-    $ notmuch dump notmuch-dump-b4chert
+    $ notmuch dump --output=notmuch-dump-b4chert
 
 Move away your old database:
 
@@ -46,7 +61,7 @@ After the initial import it is definitely not necessary to define
 
 Restore your tags:
 
-    $ notmuch restore notmuch-dump-b4chert
+    $ notmuch restore --input=notmuch-dump-b4chert
 
 Check whether you are on chert now:
 
@@ -78,7 +93,7 @@ This needs xapian 1.2
 Backup your database:
 
     $ cd
-    $ notmuch dump notmuch-dump-b4compact
+    $ notmuch dump --output=notmuch-dump-b4compact
 
 Compact it:
 
@@ -93,9 +108,8 @@ Remove old and renamed compacted, if compacting went well:
 
 ### More information about this in the email archives:
 
-* [Carl Worth](http://notmuchmail.org/pipermail/notmuch/2010/001105.html)
-
-* [Sebastian Spaeth](http://notmuchmail.org/pipermail/notmuch/2011/004048.html)
+* [Carl Worth](https://notmuchmail.org/pipermail/notmuch/2010/001105.html)
 
-* [Pieter Praet](http://notmuchmail.org/pipermail/notmuch/2011/004175.html)
+* [Sebastian Spaeth](https://notmuchmail.org/pipermail/notmuch/2011/004048.html)
 
+* [Pieter Praet](https://notmuchmail.org/pipermail/notmuch/2011/004175.html)