From: Timo Sirainen <tss@iki.fi>
Date: Wed, 28 Apr 2004 19:41:21 +0000 (+0300)
Subject: when growing index file, do it exponentially for this session (files being
X-Git-Tag: 1.1.alpha1~4178
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=690af4a90eaf8611c2573d34126bb7a852c50a44;p=thirdparty%2Fdovecot%2Fcore.git

when growing index file, do it exponentially for this session (files being
added one at a time).

--HG--
branch : HEAD
---

diff --git a/src/lib-index/mail-index-private.h b/src/lib-index/mail-index-private.h
index 0ba9c21607..dcb04c36b1 100644
--- a/src/lib-index/mail-index-private.h
+++ b/src/lib-index/mail-index-private.h
@@ -74,6 +74,8 @@ struct mail_index {
 	char *copy_lock_path;
 	struct dotlock dotlock;
 
+	unsigned int last_grow_count;
+
 	char *error;
 	unsigned int nodiskspace:1;
 	unsigned int index_lock_timeout:1;
diff --git a/src/lib-index/mail-index-sync-update.c b/src/lib-index/mail-index-sync-update.c
index 6780ddde8b..03a1287e5e 100644
--- a/src/lib-index/mail-index-sync-update.c
+++ b/src/lib-index/mail-index-sync-update.c
@@ -107,9 +107,13 @@ static int mail_index_grow(struct mail_index *index, unsigned int count)
 		return 0;
 	}
 
-	// FIXME: grow exponentially
-	size = map->file_used_size +
-		count * sizeof(struct mail_index_record);
+	/* when we grow fast, do it exponentially */
+	if (count < index->last_grow_count)
+		count = index->last_grow_count;
+	count = nearest_power(count);
+	index->last_grow_count = count;
+
+	size = map->file_used_size + count * sizeof(struct mail_index_record);
 	if (file_set_size(index->fd, (off_t)size) < 0)
 		return mail_index_set_syscall_error(index, "file_set_size()");