MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/12/00 through 08/18/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 40,961 2,064,604
MED90 8,122 159,393
MED85 5,668 56,331
MED80 4,809 31,478
MED75 4,470 16,260
MED66 4,669 21,957
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,996 94,339
2-4 a.m. 429 13,307
4-6 a.m. 423 31,785
6-8 a.m. 1,302 48,106
8-10 a.m. 5,854 198,390
10-12 a.m. 11,822 399,969
12-2 p.m. 11,967 408,907
2-4 p.m. 14,741 469,263
4-6 p.m. 10,951 377,056
6-8 p.m. 4,835 140,959
8-10 p.m. 2,606 82,337
10-12 p.m. 1,773 85,605
__________ _____________ _________________
Total: 68,699 2,350,023
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 295
Davis 669
Irvine 126
Los Angeles 809
Riverside 55
San Diego 847
San Francisco 1,620
Santa Barbara 78
Santa Cruz 377
Lawrence Berkeley 34
Lawrence Livermore 49
Los Alamos 0
MELWEB 53,498
Searchlight 9,655
Other - UC 215
Other-Network UC 372
_____
68,699
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,306
Davis 6,789
Irvine 1,054
Los Angeles 9,569
Riverside 176
San Diego 7,024
San Francisco 18,480
Santa Barbara 555
Santa Cruz 3,165
Lawrence Berkeley 98
Lawrence Livermore 557
Los Alamos 0
MELWEB 2,065,679
Searchlight 230,601
Other - UC 927
Other-Network UC 3,043
_____
2,350,023
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 3.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:17
Average session length (minutes:seconds) 18:56
Longest session recorded (minutes:seconds) 225:45
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 357.6
Retrievals per search - standard deviation 4128.3
Percent of searches completed with 0 results 31.5%
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 68,699 12.6%
PRESENT 445,339 82.0%
INIT or CLOSE 28,851 5.3%
OTHER 423 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 4,419 4.5% 1,737 39.3% 4 802.7 4536.9
PERSONAL AUTHOR 22,215 22.4% 6,431 28.9% 7 86.1 1178.8
TITLE WORD 7,549 7.6% 2,642 35.0% 3 159.3 1510.0
SUBSET 167 0.2% 36 21.6% 30 153.7 454.0
SUBJECT WORD 431 0.4% 152 35.3% 6 1113.5 10380.2
SUBJECT 1,876 1.9% 776 41.4% 14 775.9 5994.8
EXACT SUBJECT 3,784 3.8% 862 22.8% 29 431.7 3478.0
MAJOR SUBJECT 191 0.2% 64 33.5% 10 131.4 455.4
EXACT MAJOR SUBJ 310 0.3% 64 20.6% 21 887.7 6377.7
EXACT TITLE 953 1.0% 520 54.6% 1 23.9 395.4
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,316 1.3% 474 36.0% 166 1378.1 2891.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 21 0.0% 7 33.3% 17 50.1 81.9
KEYWORD 38,584 38.9% 12,341 32.0% 15 689.8 6237.9
DATE 2,184 2.2% 446 20.4% 4 209.5 3237.1
LANGUAGE 5,362 5.4% 1,300 24.2% 24 313.4 1955.8
UNIQUE ID 316 0.3% 25 7.9% 1 1.1 1.0
ADDED 2,819 2.8% 1,042 37.0% 6 21.4 38.7
PUB TYPE 2,352 2.4% 564 24.0% 22 143.4 483.5
AUTHOR AFFIL. 650 0.7% 247 38.0% 9 87.0 677.9
CHEMICAL NAME 38 0.0% 31 81.6% 11 60.4 76.8
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 3,042 3.1% 819 26.9% 16 477.0 3155.5
AGE 147 0.1% 27 18.4% 17 116.7 380.5
ISN 2 0.0% 2 100% 0 0.0 0.0
ARTICLE 99 0.1% 31 31.3% 64 233.0 555.5
XXS 258 0.3% 99 38.4% 16 927.5 7118.0
XMXS 170 0.2% 44 25.9% 25 59.3 129.5
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 13 0.0% 8 61.5% 3 1922.0 4257.0
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 20,883 30.4% 6,603 31.6% 6 228.5 2584.9
Single 47,816 69.6% 15,020 31.4% 14 649.6 5710.9
PRESENT commands, by type:
MARC 30.8%
OPAC 36.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS