database/mariadb-columnstore-engine
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fix(memory leaks): MCOL-5791 - get rid of memory leaks in plugin code

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There were numerous memory leaks in plugin's code and associated code.
During typical run of MTR tests it leaked around 65 megabytes of
objects. As a result they may severely affect long-lived connections.

This patch fixes (almost) all leaks found in the plugin. The exceptions
are two leaks associated with SHOW CREATE TABLE columnstore_table and
getting information of columns of columnstore-handled table. These
should be fixed on the server side and work is on the way.
This commit is contained in:
Serguey Zefirov
2024-09-30 14:50:35 +03:00
committed by Sergey Zefirov
parent 6445f4dff3
commit 38fd96a663
31 changed files with 472 additions and 229 deletions
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39
writeengine/bulk/we_extentstripealloc.h
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@ -46,21 +46,6 @@ class Log;
class AllocExtEntry
{
public:
// Default constructor
AllocExtEntry()
: fOid(0)
, fColWidth(0)
, fDbRoot(0)
, fPartNum(0)
, fSegNum(0)
, fStartLbid(0)
, fAllocSize(0)
, fHwm(0)
, fStatus(NO_ERROR)
, fStripeKey(0)
{
}
// Used to create entry for an existing extent we are going to add data to.
AllocExtEntry(OID& oid, int colWidth, uint16_t dbRoot, uint32_t partNum, uint16_t segNum,
BRM::LBID_t startLbid, int allocSize, HWM hwm, int status, const std::string& statusMsg,
@ -74,22 +59,22 @@ class AllocExtEntry
, fAllocSize(allocSize)
, fHwm(hwm)
, fStatus(status)
, fStatusMsg(statusMsg)
, fStatusMsg(new std::string(statusMsg))
, fStripeKey(stripeKey)
{
}
OID fOid; // column OID
int fColWidth; // colum width (in bytes)
uint16_t fDbRoot; // DBRoot of allocated extent
uint32_t fPartNum; // Partition number of allocated extent
uint16_t fSegNum; // Segment number of allocated extent
BRM::LBID_t fStartLbid; // Starting LBID of allocated extent
int fAllocSize; // Number of allocated LBIDS
HWM fHwm; // Starting fbo or hwm of allocated extent
int fStatus; // Status of extent allocation
std::string fStatusMsg; // Status msg of extent allocation
unsigned int fStripeKey; // "Stripe" identifier for this extent
OID fOid = 0; // column OID
int fColWidth = 0; // colum width (in bytes)
uint16_t fDbRoot = 0; // DBRoot of allocated extent
uint32_t fPartNum = 0; // Partition number of allocated extent
uint16_t fSegNum = 0; // Segment number of allocated extent
BRM::LBID_t fStartLbid = 0; // Starting LBID of allocated extent
int fAllocSize = 0; // Number of allocated LBIDS
HWM fHwm = 0; // Starting fbo or hwm of allocated extent
int fStatus = NO_ERROR; // Status of extent allocation
std::shared_ptr<std::string> fStatusMsg{new std::string()}; // Status msg of extent allocation
unsigned int fStripeKey = 0; // "Stripe" identifier for this extent
};
//------------------------------------------------------------------------------