MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/01/00 through 07/07/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 29,107 1,489,587
MED90 6,253 123,479
MED85 4,468 53,307
MED80 3,867 35,439
MED75 3,617 30,831
MED66 3,702 24,187
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,711 41,084
2-4 a.m. 416 6,234
4-6 a.m. 203 7,098
6-8 a.m. 461 20,625
8-10 a.m. 4,060 134,648
10-12 a.m. 9,213 329,524
12-2 p.m. 9,259 303,493
2-4 p.m. 10,629 374,463
4-6 p.m. 8,482 294,530
6-8 p.m. 3,728 129,141
8-10 p.m. 1,780 72,004
10-12 p.m. 1,072 43,986
__________ _____________ _________________
Total: 51,014 1,756,830
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 406
Davis 365
Irvine 118
Los Angeles 578
Riverside 12
San Diego 743
San Francisco 847
Santa Barbara 56
Santa Cruz 54
Lawrence Berkeley 72
Lawrence Livermore 4
Los Alamos 0
MELWEB 42,979
Searchlight 4,384
Other - UC 37
Other-Network UC 359
_____
51,014
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,508
Davis 3,304
Irvine 494
Los Angeles 4,367
Riverside 38
San Diego 6,292
San Francisco 5,386
Santa Barbara 526
Santa Cruz 286
Lawrence Berkeley 540
Lawrence Livermore 453
Los Alamos 0
MELWEB 1,695,742
Searchlight 31,556
Other - UC 75
Other-Network UC 4,263
_____
1,756,830
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 4.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.5
Standard deviation in seconds 1.0
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:17
Average session length (minutes:seconds) 19:04
Longest session recorded (minutes:seconds) 201:56
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 358.3
Retrievals per search - standard deviation 3761.3
Percent of searches completed with 0 results 33.3%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 51,014 13.4%
PRESENT 307,681 80.7%
INIT or CLOSE 22,017 5.8%
OTHER 344 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 3,263 4.6% 1,258 38.6% 4 904.6 3361.5
PERSONAL AUTHOR 16,922 23.7% 4,766 28.2% 7 75.5 508.6
TITLE WORD 5,936 8.3% 2,267 38.2% 2 186.1 2705.2
SUBSET 94 0.1% 14 14.9% 33 202.9 503.2
SUBJECT WORD 121 0.2% 61 50.4% 9 775.2 3262.2
SUBJECT 1,458 2.0% 744 51.0% 21 1166.8 5639.5
EXACT SUBJECT 2,531 3.5% 564 22.3% 30 352.5 2119.1
MAJOR SUBJECT 90 0.1% 43 47.8% 10 501.7 1938.5
EXACT MAJOR SUBJ 226 0.3% 33 14.6% 16 274.5 838.9
EXACT TITLE 528 0.7% 292 55.3% 1 8.3 42.4
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 932 1.3% 357 38.3% 348 1689.8 3553.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 4 0.0% 2 50.0% 119 119.0 70.7
KEYWORD 28,117 39.3% 9,873 35.1% 17 716.5 5966.5
DATE 1,466 2.1% 339 23.1% 6 141.8 689.9
LANGUAGE 3,508 4.9% 896 25.5% 20 216.0 981.1
UNIQUE ID 415 0.6% 166 40.0% 1 1.0 0.3
ADDED 1,114 1.6% 584 52.4% 4 11.7 20.0
PUB TYPE 1,697 2.4% 387 22.8% 23 120.2 406.8
AUTHOR AFFIL. 425 0.6% 177 41.6% 10 25.3 78.0
CHEMICAL NAME 16 0.0% 5 31.3% 13 16.0 13.9
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,223 3.1% 670 30.1% 22 418.4 2558.0
AGE 121 0.2% 17 14.0% 23 233.8 852.5
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 54 0.1% 16 29.6% 22 191.0 534.7
XXS 101 0.1% 32 31.7% 9 539.9 2302.5
XMXS 83 0.1% 20 24.1% 12 1140.2 8158.8
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 11 0.0% 8 72.7% 55 69.3 63.7
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 14,150 27.7% 4,787 33.8% 7 189.2 2132.4
Single 36,864 72.3% 12,194 33.1% 15 669.0 5228.1
PRESENT commands, by type:
MARC 31.0%
OPAC 28.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS