From: Howard Chu <hyc@openldap.org>
Date: Thu, 12 Dec 2002 23:39:21 +0000 (+0000)
Subject: Added searchstack keyword description. (Sorry, I don't like the word "slab"...)
X-Git-Tag: NO_SLAP_OP_BLOCKS~684
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=143603690f0436f049140102027d78f2dbb7f447;p=openldap

Added searchstack keyword description. (Sorry, I don't like the word "slab"...)
---

diff --git a/doc/man/man5/slapd-bdb.5 b/doc/man/man5/slapd-bdb.5
index c76dbdb4bc..b387fd3de9 100644
--- a/doc/man/man5/slapd-bdb.5
+++ b/doc/man/man5/slapd-bdb.5
@@ -94,6 +94,19 @@ The default is the same as
 Specify the file protection mode that newly created database 
 index files should have.
 The default is 0600.
+.TP
+.B searchstack <depth>
+Specify the depth of the stack used for search filter evaluation.
+Search filters are evaluated on a stack to accomodate nested AND / OR
+clauses. An individual stack is assigned to each server thread.
+The depth of the stack determines how complex a filter can be
+evaluated without requiring any additional memory allocation. Filters that
+are nested deeper than the search stack depth will cause a separate
+stack to be allocated for that particular search operation. These
+allocations can have a major negative impact on server performance,
+but specifying too much stack will also consume a great deal of memory.
+Each search stack uses 512K bytes per level. The default stack depth
+is 16, thus 8MB per thread is used.
 .SH FILES
 .TP
 ETCDIR/slapd.conf