From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 31 Jan 2012 19:35:07 +0000 (+0100)
Subject: journal: increase compression threshold for objects from 64 to 512
X-Git-Tag: v40~24
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=be19b7df6ebe9cc521e929c5de2fe74ef84f7f80;p=elogind.git

journal: increase compression threshold for objects from 64 to 512

Apparently the perfomance price for compression is to steep to apply it
for all objects >= 64 and < 512 in size, as measured by Arjan Van De
Ven, hence increase the threshold to 512 which yields better results.
---

diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
index 59ad84e23..20ca3f61c 100644
--- a/src/journal/journal-file.c
+++ b/src/journal/journal-file.c
@@ -37,7 +37,7 @@
 
 #define DEFAULT_WINDOW_SIZE (128ULL*1024ULL*1024ULL)
 
-#define COMPRESSION_SIZE_THRESHOLD (64ULL)
+#define COMPRESSION_SIZE_THRESHOLD (512ULL)
 
 /* This is the minimum journal file size */
 #define JOURNAL_FILE_SIZE_MIN (64ULL*1024ULL)