MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/16/00 through 09/22/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 42,204 2,175,218
MED90 8,448 182,714
MED85 6,040 75,543
MED80 5,025 30,009
MED75 4,682 18,482
MED66 4,825 19,649
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,005 23,978
2-4 a.m. 488 7,569
4-6 a.m. 399 11,392
6-8 a.m. 1,045 27,845
8-10 a.m. 5,394 190,456
10-12 a.m. 12,480 421,696
12-2 p.m. 12,372 476,136
2-4 p.m. 15,410 526,308
4-6 p.m. 11,640 405,215
6-8 p.m. 4,994 183,327
8-10 p.m. 3,034 153,388
10-12 p.m. 1,963 74,305
__________ _____________ _________________
Total: 71,224 2,501,615
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 187
Davis 784
Irvine 28
Los Angeles 658
Riverside 137
San Diego 691
San Francisco 1,269
Santa Barbara 104
Santa Cruz 1
Lawrence Berkeley 77
Lawrence Livermore 6
Los Alamos 0
MELWEB 59,232
Searchlight 7,592
Other - UC 24
Other-Network UC 434
_____
71,224
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,298
Davis 14,907
Irvine 516
Los Angeles 15,476
Riverside 1,698
San Diego 5,499
San Francisco 11,136
Santa Barbara 910
Santa Cruz 1
Lawrence Berkeley 500
Lawrence Livermore 41
Los Alamos 0
MELWEB 2,433,683
Searchlight 10,436
Other - UC 77
Other-Network UC 4,437
_____
2,501,615
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) 21:37
Average session length (minutes:seconds) 20:11
Longest session recorded (minutes:seconds) 224:58
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 353.9
Retrievals per search - standard deviation 4104.5
Percent of searches completed with 0 results 32.6%
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 71,224 12.9%
PRESENT 451,958 81.6%
INIT or CLOSE 30,012 5.4%
OTHER 327 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 4,599 4.5% 1,854 40.3% 4 956.7 4748.4
PERSONAL AUTHOR 22,501 22.2% 6,393 28.4% 7 75.8 633.0
TITLE WORD 7,331 7.2% 2,703 36.9% 4 196.9 1479.1
SUBSET 194 0.2% 48 24.7% 25 180.8 921.0
SUBJECT WORD 174 0.2% 100 57.5% 13 200.4 1021.0
SUBJECT 2,060 2.0% 1,130 54.9% 22 836.6 6180.7
EXACT SUBJECT 4,391 4.3% 1,041 23.7% 35 469.6 3086.6
MAJOR SUBJECT 171 0.2% 88 51.5% 39 321.3 1074.4
EXACT MAJOR SUBJ 588 0.6% 162 27.6% 22 239.1 655.6
EXACT TITLE 736 0.7% 416 56.5% 1 12.1 77.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,207 1.2% 452 37.4% 357 1697.8 3790.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 4 0.0% 1 25.0% 25 27.0 13.1
KEYWORD 40,334 39.7% 13,667 33.9% 17 688.1 6322.4
DATE 2,238 2.2% 499 22.3% 6 76.7 465.2
LANGUAGE 5,574 5.5% 1,551 27.8% 32 389.8 2528.9
UNIQUE ID 387 0.4% 73 18.9% 1 1.0 0.2
ADDED 1,330 1.3% 1,107 83.2% 3 14.3 47.3
PUB TYPE 2,488 2.5% 569 22.9% 23 162.8 856.0
AUTHOR AFFIL. 586 0.6% 253 43.2% 10 42.9 193.0
CHEMICAL NAME 3 0.0% 2 66.7% 4 4.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 3,927 3.9% 1,255 32.0% 23 562.8 3226.1
AGE 307 0.3% 123 40.1% 27 124.0 556.4
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 119 0.1% 20 16.8% 49 616.6 2107.9
XXS 184 0.2% 78 42.4% 5 471.1 2241.0
XMXS 86 0.1% 35 40.7% 62 267.4 515.3
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 12 0.0% 11 91.7% 13 13.0 0.0
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 20,729 29.1% 7,450 35.9% 8 275.5 2167.0
Single 50,495 70.9% 15,803 31.3% 15 621.2 5712.5
PRESENT commands, by type:
MARC 33.0%
OPAC 27.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS