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6b119d9170
* Introduce dirty page pressure handling in the dbengine page cache that invalidates pages when the disk cannot keep up with the flushing speed.
53 lines
No EOL
2.4 KiB
C
53 lines
No EOL
2.4 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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#ifndef NETDATA_RRDENGINEAPI_H
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#define NETDATA_RRDENGINEAPI_H
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#include "rrdengine.h"
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#define RRDENG_MIN_PAGE_CACHE_SIZE_MB (8)
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#define RRDENG_MIN_DISK_SPACE_MB (256)
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#define RRDENG_NR_STATS (37)
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#define RRDENG_FD_BUDGET_PER_INSTANCE (50)
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extern int default_rrdeng_page_cache_mb;
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extern int default_rrdeng_disk_quota_mb;
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extern uint8_t rrdeng_drop_metrics_under_page_cache_pressure;
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struct rrdeng_region_info {
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time_t start_time;
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int update_every;
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unsigned points;
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};
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extern void *rrdeng_create_page(struct rrdengine_instance *ctx, uuid_t *id, struct rrdeng_page_descr **ret_descr);
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extern void rrdeng_commit_page(struct rrdengine_instance *ctx, struct rrdeng_page_descr *descr,
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Word_t page_correlation_id);
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extern void *rrdeng_get_latest_page(struct rrdengine_instance *ctx, uuid_t *id, void **handle);
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extern void *rrdeng_get_page(struct rrdengine_instance *ctx, uuid_t *id, usec_t point_in_time, void **handle);
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extern void rrdeng_put_page(struct rrdengine_instance *ctx, void *handle);
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extern void rrdeng_store_metric_init(RRDDIM *rd);
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extern void rrdeng_store_metric_flush_current_page(RRDDIM *rd);
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extern void rrdeng_store_metric_next(RRDDIM *rd, usec_t point_in_time, storage_number number);
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extern void rrdeng_store_metric_finalize(RRDDIM *rd);
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extern unsigned
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rrdeng_variable_step_boundaries(RRDSET *st, time_t start_time, time_t end_time,
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struct rrdeng_region_info **region_info_arrayp, unsigned *max_intervalp);
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extern void rrdeng_load_metric_init(RRDDIM *rd, struct rrddim_query_handle *rrdimm_handle,
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time_t start_time, time_t end_time);
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extern storage_number rrdeng_load_metric_next(struct rrddim_query_handle *rrdimm_handle, time_t *current_time);
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extern int rrdeng_load_metric_is_finished(struct rrddim_query_handle *rrdimm_handle);
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extern void rrdeng_load_metric_finalize(struct rrddim_query_handle *rrdimm_handle);
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extern time_t rrdeng_metric_latest_time(RRDDIM *rd);
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extern time_t rrdeng_metric_oldest_time(RRDDIM *rd);
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extern void rrdeng_get_37_statistics(struct rrdengine_instance *ctx, unsigned long long *array);
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/* must call once before using anything */
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extern int rrdeng_init(struct rrdengine_instance **ctxp, char *dbfiles_path, unsigned page_cache_mb,
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unsigned disk_space_mb);
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extern int rrdeng_exit(struct rrdengine_instance *ctx);
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#endif /* NETDATA_RRDENGINEAPI_H */ |