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PrintBufferUsage() changed to report about shared, local and direct

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blocks transfferes.
This commit is contained in:
Vadim B. Mikheev
1997-04-18 02:53:37 +00:00
parent 55f5354380
commit d3dfc664d0
3 changed files with 41 additions and 14 deletions
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37
src/backend/storage/buffer/bufmgr.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.11 1997/03/28 07:05:03 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.12 1997/04/18 02:53:23 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -75,9 +75,12 @@
#include "catalog/catalog.h"
extern SPINLOCK BufMgrLock;
extern int ReadBufferCount;
extern int BufferHitCount;
extern int BufferFlushCount;
extern long int ReadBufferCount;
extern long int ReadLocalBufferCount;
extern long int BufferHitCount;
extern long int LocalBufferHitCount;
extern long int BufferFlushCount;
extern long int LocalBufferFlushCount;
static int WriteMode = BUFFER_LATE_WRITE; /* Delayed write is default */
@ -217,7 +220,9 @@ ReadBufferWithBufferLock(Relation reln,
isLocalBuf = reln->rd_islocal;
if (isLocalBuf) {
ReadLocalBufferCount++;
bufHdr = LocalBufferAlloc(reln, blockNum, &found);
if (found) LocalBufferHitCount++;
} else {
ReadBufferCount++;
@ -473,7 +478,6 @@ BufferAlloc(Relation reln,
}
else
{
BufferFlushCount++;
/*
* BM_JUST_DIRTIED cleared by BufferReplace and shouldn't
* be setted by anyone. - vadim 01/17/97
@ -760,6 +764,7 @@ FlushBuffer(Buffer buffer, bool release)
bufHdr->tag.blockNum, bufHdr->sb_relname);
return (STATUS_ERROR);
}
BufferFlushCount++;
SpinAcquire(BufMgrLock);
/*
@ -955,6 +960,7 @@ BufferSync()
elog(WARN, "BufferSync: cannot write %u for %s",
bufHdr->tag.blockNum, bufHdr->sb_relname);
}
BufferFlushCount++;
/*
* If this buffer was marked by someone as DIRTY while
* we were flushing it out we must not clear DIRTY flag
@ -1052,16 +1058,24 @@ void
PrintBufferUsage(FILE *statfp)
{
float hitrate;
float localhitrate;
if (ReadBufferCount==0)
hitrate = 0.0;
else
hitrate = (float)BufferHitCount * 100.0/ReadBufferCount;
fprintf(statfp, "!\t%ld blocks read, %ld blocks written, buffer hit rate = %.2f%%\n",
ReadBufferCount - BufferHitCount + NDirectFileRead,
BufferFlushCount + NDirectFileWrite,
hitrate);
if (ReadLocalBufferCount==0)
localhitrate = 0.0;
else
localhitrate = (float)LocalBufferHitCount * 100.0/ReadLocalBufferCount;
fprintf(statfp, "!\tShared blocks: %10ld read, %10ld written, buffer hit rate = %.2f%%\n",
ReadBufferCount - BufferHitCount, BufferFlushCount, hitrate);
fprintf(statfp, "!\tLocal blocks: %10ld read, %10ld written, buffer hit rate = %.2f%%\n",
ReadLocalBufferCount - LocalBufferHitCount, LocalBufferFlushCount, localhitrate);
fprintf(statfp, "!\tDirect blocks: %10ld read, %10ld written\n",
NDirectFileRead, NDirectFileWrite);
}
void
@ -1070,6 +1084,9 @@ ResetBufferUsage()
BufferHitCount = 0;
ReadBufferCount = 0;
BufferFlushCount = 0;
LocalBufferHitCount = 0;
ReadLocalBufferCount = 0;
LocalBufferFlushCount = 0;
NDirectFileRead = 0;
NDirectFileWrite = 0;
}
@ -1264,6 +1281,8 @@ BufferReplace(BufferDesc *bufHdr, bool bufferLockHeld)
if (status == SM_FAIL)
return (FALSE);
BufferFlushCount++;
return (TRUE);
}