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Fix a problem with auto-vacuum databases and the VACUUM command. Also add "pages read" and "pages written" statistics to the pager layer. (CVS 2183)

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FossilOrigin-Name: fb3bf68d0e83b463c7e2f95b4502ba6f8158c074
This commit is contained in:
danielk1977
2005-01-08 12:42:39 +00:00
parent 59adfaa6ce
commit 42741be968
6 changed files with 69 additions and 17 deletions
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10
src/pager.c
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@@ -18,7 +18,7 @@
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.179 2004/11/24 01:16:43 drh Exp $
** @(#) $Id: pager.c,v 1.180 2005/01/08 12:42:39 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
@@ -244,6 +244,7 @@ struct Pager {
int nRef; /* Number of in-memory pages with PgHdr.nRef>0 */
int mxPage; /* Maximum number of pages to hold in cache */
int nHit, nMiss, nOvfl; /* Cache hits, missing, and LRU overflows */
int nRead,nWrite; /* Database pages read/written */
void (*xCodec)(void*,void*,Pgno,int); /* Routine for en/decoding data */
void *pCodecArg; /* First argument to xCodec() */
u8 journalOpen; /* True if journal file descriptors is valid */
@@ -2067,6 +2068,7 @@ static int pager_write_pagelist(PgHdr *pList){
TRACE3("STORE %d page %d\n", PAGERID(pPager), pList->pgno);
rc = sqlite3OsWrite(&pPager->fd, PGHDR_TO_DATA(pList), pPager->pageSize);
CODEC(pPager, PGHDR_TO_DATA(pList), pList->pgno, 0);
pPager->nWrite++;
}
#ifndef NDEBUG
else{
@@ -2350,6 +2352,8 @@ int sqlite3pager_get(Pager *pPager, Pgno pgno, void **ppPage){
}else{
memset(PGHDR_TO_DATA(pPg), 0, pPager->pageSize);
}
}else{
pPager->nRead++;
}
}
}else{
@@ -3006,7 +3010,7 @@ int sqlite3pager_isreadonly(Pager *pPager){
** This routine is used for testing and analysis only.
*/
int *sqlite3pager_stats(Pager *pPager){
static int a[9];
static int a[11];
a[0] = pPager->nRef;
a[1] = pPager->nPage;
a[2] = pPager->mxPage;
@@ -3016,6 +3020,8 @@ int *sqlite3pager_stats(Pager *pPager){
a[6] = pPager->nHit;
a[7] = pPager->nMiss;
a[8] = pPager->nOvfl;
a[9] = pPager->nRead;
a[10] = pPager->nWrite;
return a;
}